/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:52:28,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:52:28,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:52:28,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 12:52:28,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 12:52:28,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 12:52:28,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 12:52:28,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 12:52:28,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 12:52:28,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 12:52:28,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 12:52:28,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 12:52:28,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 12:52:28,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 12:52:28,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 12:52:28,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 12:52:28,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 12:52:28,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 12:52:28,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 12:52:28,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 12:52:28,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 12:52:28,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 12:52:28,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 12:52:28,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 12:52:28,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 12:52:28,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 12:52:28,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 12:52:28,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 12:52:28,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 12:52:28,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 12:52:28,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 12:52:28,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 12:52:28,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 12:52:28,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 12:52:28,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 12:52:28,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 12:52:28,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 12:52:28,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 12:52:28,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 12:52:28,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 12:52:28,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 12:52:28,569 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 [2021-08-21 12:52:28,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:52:28,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:52:28,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:52:28,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:52:28,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:52:28,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:52:28,601 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:52:28,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:52:28,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:52:28,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:52:28,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:52:28,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:52:28,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:52:28,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:52:28,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:52:28,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:52:28,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:52:28,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:52:28,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:52:28,604 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:52:28,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:52:28,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:52:28,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:52:28,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:52:28,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:52:28,884 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:52:28,885 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:52:28,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2021-08-21 12:52:28,885 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-08-21 12:52:28,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:52:28,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:52:28,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:52:28,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:52:28,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:52:28,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:52:28,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:52:28,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:52:28,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:52:28,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:52:28,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:52:28,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:52:28,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:52:28,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/1) ... [2021-08-21 12:52:28,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:52:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:29,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:52:29,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:52:29,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:52:29,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:52:29,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:52:29,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:52:29,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:52:29,094 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:52:29,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:52:29,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:52:29,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:52:29,095 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:52:29,209 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:52:29,209 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 12:52:29,210 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 12:52:29,210 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 12:52:29,211 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:52:29 BoogieIcfgContainer [2021-08-21 12:52:29,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:52:29,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:52:29,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:52:29,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:52:29,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:52:28" (1/2) ... [2021-08-21 12:52:29,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43597b89 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:52:29, skipping insertion in model container [2021-08-21 12:52:29,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:52:29" (2/2) ... [2021-08-21 12:52:29,216 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-08-21 12:52:29,219 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:52:29,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:52:29,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:52:29,219 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:52:29,238 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:52:29,275 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:52:29,279 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:52:29,279 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:52:29,284 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-08-21 12:52:29,291 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-21 12:52:29,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:29,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:29,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash 185268790, now seen corresponding path program 1 times [2021-08-21 12:52:29,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:29,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710590728] [2021-08-21 12:52:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:29,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:29,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:29,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710590728] [2021-08-21 12:52:29,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710590728] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:52:29,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:52:29,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:52:29,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740048731] [2021-08-21 12:52:29,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:52:29,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:52:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:52:29,398 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:29,413 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-08-21 12:52:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:52:29,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-21 12:52:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:29,420 INFO L225 Difference]: With dead ends: 20 [2021-08-21 12:52:29,420 INFO L226 Difference]: Without dead ends: 16 [2021-08-21 12:52:29,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:52:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-21 12:52:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-21 12:52:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-08-21 12:52:29,438 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-08-21 12:52:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:29,438 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-08-21 12:52:29,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-08-21 12:52:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:52:29,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:29,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:29,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:52:29,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:29,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:29,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1471443425, now seen corresponding path program 1 times [2021-08-21 12:52:29,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:29,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007392959] [2021-08-21 12:52:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:29,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:29,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:29,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007392959] [2021-08-21 12:52:29,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007392959] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:52:29,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:52:29,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:52:29,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811788573] [2021-08-21 12:52:29,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:52:29,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:52:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:52:29,465 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:29,470 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-08-21 12:52:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:52:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 12:52:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:29,471 INFO L225 Difference]: With dead ends: 21 [2021-08-21 12:52:29,471 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 12:52:29,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:52:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 12:52:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 12:52:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-08-21 12:52:29,474 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-08-21 12:52:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:29,474 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-08-21 12:52:29,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-08-21 12:52:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:52:29,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:29,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:29,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:52:29,475 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:29,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:29,475 INFO L82 PathProgramCache]: Analyzing trace with hash 820973954, now seen corresponding path program 1 times [2021-08-21 12:52:29,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:29,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015231534] [2021-08-21 12:52:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:29,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:29,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:29,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015231534] [2021-08-21 12:52:29,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015231534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:29,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891712675] [2021-08-21 12:52:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:29,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:29,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:29,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:52:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:52:29,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:29,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:29,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891712675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:29,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:29,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:52:29,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75863780] [2021-08-21 12:52:29,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:52:29,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:52:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:52:29,660 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:29,683 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-08-21 12:52:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:52:29,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 12:52:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:29,684 INFO L225 Difference]: With dead ends: 25 [2021-08-21 12:52:29,684 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 12:52:29,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:52:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 12:52:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-21 12:52:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-08-21 12:52:29,687 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-08-21 12:52:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:29,687 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-08-21 12:52:29,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-08-21 12:52:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 12:52:29,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:29,688 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:29,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:29,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:29,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -296532971, now seen corresponding path program 2 times [2021-08-21 12:52:29,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:29,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536271467] [2021-08-21 12:52:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:29,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:29,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:29,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536271467] [2021-08-21 12:52:29,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536271467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:29,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968179354] [2021-08-21 12:52:29,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:29,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:29,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:29,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:29,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:52:29,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:29,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:52:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:30,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968179354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:30,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:30,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-21 12:52:30,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498032743] [2021-08-21 12:52:30,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:52:30,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:30,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:52:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:52:30,055 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:30,069 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-08-21 12:52:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:52:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 12:52:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:30,072 INFO L225 Difference]: With dead ends: 50 [2021-08-21 12:52:30,073 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 12:52:30,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:52:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 12:52:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-08-21 12:52:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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) [2021-08-21 12:52:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-08-21 12:52:30,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-08-21 12:52:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:30,078 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-08-21 12:52:30,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-08-21 12:52:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:52:30,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:30,078 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:30,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:30,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 12:52:30,298 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:30,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1667530614, now seen corresponding path program 3 times [2021-08-21 12:52:30,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:30,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459872536] [2021-08-21 12:52:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:30,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:30,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:30,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459872536] [2021-08-21 12:52:30,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459872536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:30,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667157491] [2021-08-21 12:52:30,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:30,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:30,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:30,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:52:30,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:52:30,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:30,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:52:30,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:30,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667157491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:30,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:30,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:52:30,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641823167] [2021-08-21 12:52:30,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:52:30,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:52:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:52:30,576 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:30,619 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-08-21 12:52:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:52:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:52:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:30,620 INFO L225 Difference]: With dead ends: 65 [2021-08-21 12:52:30,620 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 12:52:30,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:52:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 12:52:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-08-21 12:52:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-08-21 12:52:30,623 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-08-21 12:52:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:30,623 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-08-21 12:52:30,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-08-21 12:52:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:52:30,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:30,624 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:30,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:30,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:30,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:30,840 INFO L82 PathProgramCache]: Analyzing trace with hash 176919713, now seen corresponding path program 4 times [2021-08-21 12:52:30,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:30,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910218817] [2021-08-21 12:52:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:30,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:30,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:30,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910218817] [2021-08-21 12:52:30,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910218817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:30,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664321680] [2021-08-21 12:52:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:30,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:30,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:30,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:52:30,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:30,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:30,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:52:30,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:30,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664321680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:30,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:30,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:52:30,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709805432] [2021-08-21 12:52:30,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:52:30,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:30,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:52:30,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:52:30,978 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:30,988 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-08-21 12:52:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:52:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:52:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:30,989 INFO L225 Difference]: With dead ends: 73 [2021-08-21 12:52:30,989 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 12:52:30,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:52:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 12:52:30,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-08-21 12:52:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-08-21 12:52:30,993 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-08-21 12:52:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:30,993 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-08-21 12:52:30,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-08-21 12:52:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:52:30,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:30,994 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:31,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:31,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:31,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2143585342, now seen corresponding path program 5 times [2021-08-21 12:52:31,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:31,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696885241] [2021-08-21 12:52:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:31,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:31,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:31,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696885241] [2021-08-21 12:52:31,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696885241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:31,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629453424] [2021-08-21 12:52:31,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:31,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:31,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:31,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:31,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:52:31,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:52:31,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:52:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:31,553 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:52:31,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 12:52:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:31,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629453424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:31,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:31,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:52:31,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251551235] [2021-08-21 12:52:31,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:52:31,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:52:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:52:31,568 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:31,867 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-08-21 12:52:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:52:31,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:52:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:31,868 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:52:31,868 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 12:52:31,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:52:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 12:52:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-08-21 12:52:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-08-21 12:52:31,875 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-08-21 12:52:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:31,875 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-08-21 12:52:31,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-08-21 12:52:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:52:31,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:31,876 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:31,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:32,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:32,077 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1374078134, now seen corresponding path program 6 times [2021-08-21 12:52:32,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:32,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802947269] [2021-08-21 12:52:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:32,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:32,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:32,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802947269] [2021-08-21 12:52:32,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802947269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:32,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828405604] [2021-08-21 12:52:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:32,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:32,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:32,213 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:32,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:52:32,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:52:32,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:32,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:52:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828405604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:32,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:32,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:52:32,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520624356] [2021-08-21 12:52:32,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:52:32,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:52:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:52:32,337 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:32,443 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-08-21 12:52:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:52:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:52:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:32,444 INFO L225 Difference]: With dead ends: 121 [2021-08-21 12:52:32,444 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 12:52:32,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:52:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 12:52:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-08-21 12:52:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 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) [2021-08-21 12:52:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-08-21 12:52:32,447 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-08-21 12:52:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:32,448 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-08-21 12:52:32,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-08-21 12:52:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:52:32,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:32,448 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:32,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:32,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:32,664 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -330172575, now seen corresponding path program 7 times [2021-08-21 12:52:32,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:32,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266047982] [2021-08-21 12:52:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:32,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:32,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:32,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266047982] [2021-08-21 12:52:32,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266047982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:32,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933117937] [2021-08-21 12:52:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:32,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:32,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:32,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:52:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:52:32,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:32,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933117937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:32,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:32,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:52:32,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349002571] [2021-08-21 12:52:32,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:52:32,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:52:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:52:32,844 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:32,856 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-08-21 12:52:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:52:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:52:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:32,857 INFO L225 Difference]: With dead ends: 128 [2021-08-21 12:52:32,857 INFO L226 Difference]: Without dead ends: 117 [2021-08-21 12:52:32,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:52:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-21 12:52:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-08-21 12:52:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-08-21 12:52:32,862 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-08-21 12:52:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:32,862 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-08-21 12:52:32,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-08-21 12:52:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:52:32,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:32,863 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:32,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:33,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:33,080 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:33,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:33,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1417189886, now seen corresponding path program 8 times [2021-08-21 12:52:33,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:33,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372763198] [2021-08-21 12:52:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:33,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:33,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:33,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372763198] [2021-08-21 12:52:33,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372763198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:33,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018376921] [2021-08-21 12:52:33,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:33,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:33,189 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:33,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:52:33,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:33,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:52:33,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:33,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:33,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018376921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:33,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:33,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 12:52:33,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957511074] [2021-08-21 12:52:33,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:52:33,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:33,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:52:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:52:33,343 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:33,505 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-08-21 12:52:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:52:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:52:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:33,506 INFO L225 Difference]: With dead ends: 179 [2021-08-21 12:52:33,506 INFO L226 Difference]: Without dead ends: 105 [2021-08-21 12:52:33,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:52:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-21 12:52:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-08-21 12:52:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 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) [2021-08-21 12:52:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-08-21 12:52:33,509 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-08-21 12:52:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-08-21 12:52:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-08-21 12:52:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:52:33,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:33,510 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:33,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:33,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 12:52:33,726 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:33,726 INFO L82 PathProgramCache]: Analyzing trace with hash -960135275, now seen corresponding path program 9 times [2021-08-21 12:52:33,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:33,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404091490] [2021-08-21 12:52:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:33,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:33,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:33,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404091490] [2021-08-21 12:52:33,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404091490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:33,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577591607] [2021-08-21 12:52:33,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:33,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:33,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:33,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:33,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:52:33,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:52:33,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:52:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:33,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577591607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:33,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:33,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:52:33,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253097229] [2021-08-21 12:52:33,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:52:33,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:52:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:52:33,949 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:33,964 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-08-21 12:52:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:52:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:52:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:33,965 INFO L225 Difference]: With dead ends: 160 [2021-08-21 12:52:33,965 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 12:52:33,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:52:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 12:52:33,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-08-21 12:52:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-08-21 12:52:33,970 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-08-21 12:52:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:33,970 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-08-21 12:52:33,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-08-21 12:52:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:52:33,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:33,971 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:34,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:34,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:34,185 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1906718218, now seen corresponding path program 10 times [2021-08-21 12:52:34,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:34,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994689789] [2021-08-21 12:52:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:34,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:34,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:34,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994689789] [2021-08-21 12:52:34,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994689789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:34,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191603060] [2021-08-21 12:52:34,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:34,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:34,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:34,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:34,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:52:34,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:34,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:52:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:34,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:34,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191603060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:34,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:34,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 12:52:34,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050577781] [2021-08-21 12:52:34,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:52:34,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:52:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:52:34,542 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:34,783 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-08-21 12:52:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:52:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:52:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:34,784 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:52:34,784 INFO L226 Difference]: Without dead ends: 135 [2021-08-21 12:52:34,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:52:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-21 12:52:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-08-21 12:52:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 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) [2021-08-21 12:52:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-08-21 12:52:34,787 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-08-21 12:52:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:34,787 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-08-21 12:52:34,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-08-21 12:52:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:52:34,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:34,788 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:34,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:35,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 12:52:35,004 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1044355617, now seen corresponding path program 11 times [2021-08-21 12:52:35,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:35,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620184912] [2021-08-21 12:52:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:35,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:35,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:35,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620184912] [2021-08-21 12:52:35,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620184912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:35,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300731743] [2021-08-21 12:52:35,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:35,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:35,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:35,068 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:35,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:52:35,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:52:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:52:35,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:35,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300731743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:35,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:35,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:52:35,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713540356] [2021-08-21 12:52:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:52:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:52:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:52:35,285 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:35,314 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-08-21 12:52:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:52:35,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:52:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:35,324 INFO L225 Difference]: With dead ends: 195 [2021-08-21 12:52:35,324 INFO L226 Difference]: Without dead ends: 180 [2021-08-21 12:52:35,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:52:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-21 12:52:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-08-21 12:52:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-08-21 12:52:35,328 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-08-21 12:52:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:35,328 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-08-21 12:52:35,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-08-21 12:52:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:52:35,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:35,329 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:35,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:35,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:52:35,546 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:35,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:35,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1911214146, now seen corresponding path program 12 times [2021-08-21 12:52:35,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:35,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031674883] [2021-08-21 12:52:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:35,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:35,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:35,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031674883] [2021-08-21 12:52:35,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031674883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:35,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130667381] [2021-08-21 12:52:35,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:35,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:35,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:35,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:35,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:52:35,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:52:35,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:35,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:52:35,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:36,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:52:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 12:52:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:36,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130667381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:36,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:36,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:52:36,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698168952] [2021-08-21 12:52:36,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:52:36,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:52:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:52:36,343 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:37,882 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-08-21 12:52:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 12:52:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:52:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:37,886 INFO L225 Difference]: With dead ends: 869 [2021-08-21 12:52:37,886 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 12:52:37,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1507.2ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 12:52:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 12:52:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-08-21 12:52:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-08-21 12:52:37,898 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-08-21 12:52:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:37,898 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-08-21 12:52:37,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-08-21 12:52:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:52:37,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:37,904 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:37,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:38,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:52:38,117 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1031434442, now seen corresponding path program 13 times [2021-08-21 12:52:38,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:38,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721387276] [2021-08-21 12:52:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:38,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:38,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:38,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721387276] [2021-08-21 12:52:38,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721387276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:38,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954486310] [2021-08-21 12:52:38,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:38,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:38,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:38,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:38,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:52:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:52:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:38,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:38,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954486310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:38,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:38,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 12:52:38,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811356777] [2021-08-21 12:52:38,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:52:38,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:38,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:52:38,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:52:38,608 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:39,039 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-08-21 12:52:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:52:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:52:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:39,041 INFO L225 Difference]: With dead ends: 325 [2021-08-21 12:52:39,041 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 12:52:39,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:52:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 12:52:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-08-21 12:52:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-08-21 12:52:39,045 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-08-21 12:52:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:39,046 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-08-21 12:52:39,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-08-21 12:52:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:52:39,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:39,047 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:39,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:39,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:52:39,262 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1886618399, now seen corresponding path program 14 times [2021-08-21 12:52:39,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:39,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525587264] [2021-08-21 12:52:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:39,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:39,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:39,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525587264] [2021-08-21 12:52:39,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525587264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:39,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621766313] [2021-08-21 12:52:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:39,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:39,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:39,373 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:39,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:52:39,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:52:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:39,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621766313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:39,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:39,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:52:39,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943536216] [2021-08-21 12:52:39,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:52:39,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:52:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:52:39,583 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:39,604 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-08-21 12:52:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:52:39,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:52:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:39,605 INFO L225 Difference]: With dead ends: 274 [2021-08-21 12:52:39,605 INFO L226 Difference]: Without dead ends: 255 [2021-08-21 12:52:39,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:52:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-21 12:52:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-08-21 12:52:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-08-21 12:52:39,609 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-08-21 12:52:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:39,609 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-08-21 12:52:39,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-08-21 12:52:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:52:39,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:39,610 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:39,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:39,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:39,825 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash -260195710, now seen corresponding path program 15 times [2021-08-21 12:52:39,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:39,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42897280] [2021-08-21 12:52:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:39,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:40,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:40,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42897280] [2021-08-21 12:52:40,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42897280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:40,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582071912] [2021-08-21 12:52:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:40,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:40,073 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:40,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:52:40,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:52:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 12:52:40,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:40,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:40,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582071912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:40,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:40,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-08-21 12:52:40,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864943331] [2021-08-21 12:52:40,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:52:40,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:52:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:52:40,332 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:40,812 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-08-21 12:52:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:52:40,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:52:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:40,813 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:52:40,813 INFO L226 Difference]: Without dead ends: 249 [2021-08-21 12:52:40,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-21 12:52:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-08-21 12:52:40,815 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) [2021-08-21 12:52:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-08-21 12:52:40,816 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-08-21 12:52:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:40,816 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-08-21 12:52:40,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-08-21 12:52:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:52:40,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:40,816 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:40,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:41,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:52:41,032 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 546945813, now seen corresponding path program 16 times [2021-08-21 12:52:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:41,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180813523] [2021-08-21 12:52:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:41,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:41,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:41,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180813523] [2021-08-21 12:52:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180813523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:41,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982190273] [2021-08-21 12:52:41,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:41,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:41,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:41,127 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:41,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:52:41,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:41,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:52:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:41,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982190273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:41,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:41,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:52:41,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725949496] [2021-08-21 12:52:41,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:52:41,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:41,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:52:41,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:52:41,387 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:41,411 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-08-21 12:52:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:52:41,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:52:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:41,412 INFO L225 Difference]: With dead ends: 318 [2021-08-21 12:52:41,412 INFO L226 Difference]: Without dead ends: 297 [2021-08-21 12:52:41,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:52:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-21 12:52:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-08-21 12:52:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-08-21 12:52:41,417 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-08-21 12:52:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:41,417 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-08-21 12:52:41,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-08-21 12:52:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:52:41,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:41,418 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:41,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:41,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:52:41,626 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash 171054198, now seen corresponding path program 17 times [2021-08-21 12:52:41,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:41,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098921973] [2021-08-21 12:52:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:41,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:41,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:41,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098921973] [2021-08-21 12:52:41,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098921973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:41,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829536127] [2021-08-21 12:52:41,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:41,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:41,968 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:41,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:52:42,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:52:42,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:42,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:52:42,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:42,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:42,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829536127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:42,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:42,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-21 12:52:42,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723832475] [2021-08-21 12:52:42,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:52:42,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:52:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:52:42,272 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:42,850 INFO L93 Difference]: Finished difference Result 489 states and 947 transitions. [2021-08-21 12:52:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:52:42,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:52:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:42,852 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:52:42,852 INFO L226 Difference]: Without dead ends: 295 [2021-08-21 12:52:42,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 638.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:52:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-21 12:52:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 66. [2021-08-21 12:52:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 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) [2021-08-21 12:52:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-08-21 12:52:42,854 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 29 [2021-08-21 12:52:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:42,854 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-08-21 12:52:42,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-08-21 12:52:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:52:42,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:42,855 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:42,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:43,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:43,071 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1030791073, now seen corresponding path program 18 times [2021-08-21 12:52:43,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:43,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430947448] [2021-08-21 12:52:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:43,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:43,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:43,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430947448] [2021-08-21 12:52:43,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430947448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:43,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946438725] [2021-08-21 12:52:43,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:43,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:43,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:43,185 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:43,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:52:43,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:52:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:52:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:43,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946438725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:43,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:43,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:52:43,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857298048] [2021-08-21 12:52:43,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:52:43,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:52:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:52:43,499 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:43,535 INFO L93 Difference]: Finished difference Result 365 states and 685 transitions. [2021-08-21 12:52:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:52:43,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:52:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:43,537 INFO L225 Difference]: With dead ends: 365 [2021-08-21 12:52:43,537 INFO L226 Difference]: Without dead ends: 342 [2021-08-21 12:52:43,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:52:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-08-21 12:52:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 276. [2021-08-21 12:52:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.090909090909091) internal successors, (575), 275 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 575 transitions. [2021-08-21 12:52:43,542 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 575 transitions. Word has length 30 [2021-08-21 12:52:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:43,542 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 575 transitions. [2021-08-21 12:52:43,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 575 transitions. [2021-08-21 12:52:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:52:43,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:43,543 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:43,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 12:52:43,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:43,759 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash 576201922, now seen corresponding path program 19 times [2021-08-21 12:52:43,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:43,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989228273] [2021-08-21 12:52:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:43,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:44,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:44,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989228273] [2021-08-21 12:52:44,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989228273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:44,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407005834] [2021-08-21 12:52:44,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:44,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:44,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:44,127 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:44,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:52:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 12:52:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:44,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407005834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:44,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:44,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 12:52:44,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269501390] [2021-08-21 12:52:44,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:52:44,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:52:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:52:44,445 INFO L87 Difference]: Start difference. First operand 276 states and 575 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:45,146 INFO L93 Difference]: Finished difference Result 569 states and 1105 transitions. [2021-08-21 12:52:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:52:45,146 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:52:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:45,147 INFO L225 Difference]: With dead ends: 569 [2021-08-21 12:52:45,147 INFO L226 Difference]: Without dead ends: 345 [2021-08-21 12:52:45,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:52:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-21 12:52:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 71. [2021-08-21 12:52:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-08-21 12:52:45,150 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-08-21 12:52:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:45,151 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-08-21 12:52:45,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-08-21 12:52:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:52:45,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:45,151 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:45,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:45,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:45,368 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:45,368 INFO L82 PathProgramCache]: Analyzing trace with hash 705468629, now seen corresponding path program 20 times [2021-08-21 12:52:45,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:45,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056887374] [2021-08-21 12:52:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:45,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:45,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:45,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056887374] [2021-08-21 12:52:45,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056887374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:45,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501149739] [2021-08-21 12:52:45,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:45,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:45,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:45,515 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:45,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:52:45,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:45,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:52:45,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501149739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:45,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:45,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:52:45,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644647661] [2021-08-21 12:52:45,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:52:45,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:52:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:52:45,823 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:45,851 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-08-21 12:52:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:52:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:52:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:45,852 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:52:45,852 INFO L226 Difference]: Without dead ends: 390 [2021-08-21 12:52:45,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:52:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-21 12:52:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-08-21 12:52:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-08-21 12:52:45,857 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-08-21 12:52:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:45,857 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-08-21 12:52:45,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-08-21 12:52:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:52:45,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:45,858 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:45,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:46,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 12:52:46,074 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1931958710, now seen corresponding path program 21 times [2021-08-21 12:52:46,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:46,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373017167] [2021-08-21 12:52:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:46,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:46,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:46,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373017167] [2021-08-21 12:52:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373017167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:46,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029580531] [2021-08-21 12:52:46,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:46,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:46,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:46,477 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:46,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:52:46,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:52:46,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:52:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:47,794 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-21 12:52:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 26 [2021-08-21 12:52:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:47,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029580531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:47,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:47,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 47 [2021-08-21 12:52:47,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495753235] [2021-08-21 12:52:47,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 12:52:47,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 12:52:47,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2105, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:52:47,808 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 48 states, 48 states have (on average 1.1875) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:49,256 INFO L93 Difference]: Finished difference Result 1276 states and 2567 transitions. [2021-08-21 12:52:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:52:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1875) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:52:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:49,258 INFO L225 Difference]: With dead ends: 1276 [2021-08-21 12:52:49,258 INFO L226 Difference]: Without dead ends: 599 [2021-08-21 12:52:49,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 1926.4ms TimeCoverageRelationStatistics Valid=701, Invalid=5941, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:52:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-08-21 12:52:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 78. [2021-08-21 12:52:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.948051948051948) internal successors, (150), 77 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 150 transitions. [2021-08-21 12:52:49,263 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 150 transitions. Word has length 33 [2021-08-21 12:52:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:49,263 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 150 transitions. [2021-08-21 12:52:49,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1875) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 150 transitions. [2021-08-21 12:52:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:52:49,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:49,264 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:49,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:49,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:52:49,480 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:49,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:49,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1620184834, now seen corresponding path program 22 times [2021-08-21 12:52:49,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:49,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312159258] [2021-08-21 12:52:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:49,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:49,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:49,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312159258] [2021-08-21 12:52:49,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312159258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:49,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396041295] [2021-08-21 12:52:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:49,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:49,930 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:49,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:52:50,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:50,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 12:52:50,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:50,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396041295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:50,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:50,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-08-21 12:52:50,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788711202] [2021-08-21 12:52:50,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:52:50,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:52:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:52:50,332 INFO L87 Difference]: Start difference. First operand 78 states and 150 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:51,285 INFO L93 Difference]: Finished difference Result 85 states and 163 transitions. [2021-08-21 12:52:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:52:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:52:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:51,286 INFO L225 Difference]: With dead ends: 85 [2021-08-21 12:52:51,286 INFO L226 Difference]: Without dead ends: 81 [2021-08-21 12:52:51,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1056.9ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:52:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-21 12:52:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-21 12:52:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 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) [2021-08-21 12:52:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-08-21 12:52:51,288 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-08-21 12:52:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:51,288 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-08-21 12:52:51,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-08-21 12:52:51,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:52:51,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:51,288 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:51,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:51,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:51,497 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1290799467, now seen corresponding path program 23 times [2021-08-21 12:52:51,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:51,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304319951] [2021-08-21 12:52:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:51,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:51,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:51,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304319951] [2021-08-21 12:52:51,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304319951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:51,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622723899] [2021-08-21 12:52:51,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:51,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:51,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:51,640 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:51,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:52:51,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:52:51,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:51,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:52:51,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:52,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622723899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:52,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:52,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 12:52:52,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553007452] [2021-08-21 12:52:52,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:52:52,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:52:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:52:52,012 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:52,044 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-08-21 12:52:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:52:52,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:52:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:52,046 INFO L225 Difference]: With dead ends: 524 [2021-08-21 12:52:52,046 INFO L226 Difference]: Without dead ends: 495 [2021-08-21 12:52:52,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:52:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-21 12:52:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-08-21 12:52:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-08-21 12:52:52,062 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-08-21 12:52:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:52,062 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-08-21 12:52:52,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-08-21 12:52:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:52:52,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:52,063 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:52,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:52,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:52,280 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2100125430, now seen corresponding path program 24 times [2021-08-21 12:52:52,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:52,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937945040] [2021-08-21 12:52:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:52,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:52,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:52,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937945040] [2021-08-21 12:52:52,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937945040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:52,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645390377] [2021-08-21 12:52:52,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:52,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:52,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:52,779 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:52,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:52:53,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:52:53,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 12:52:53,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:53,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:53,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645390377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:53,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:53,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-08-21 12:52:53,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719423393] [2021-08-21 12:52:53,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:52:53,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:52:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:52:53,235 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:54,359 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-08-21 12:52:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:52:54,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:52:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:54,360 INFO L225 Difference]: With dead ends: 845 [2021-08-21 12:52:54,360 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 12:52:54,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1227.0ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:52:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 12:52:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-08-21 12:52:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-08-21 12:52:54,364 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-08-21 12:52:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:54,364 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-08-21 12:52:54,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-08-21 12:52:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:52:54,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:54,364 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:54,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:54,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:52:54,581 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:54,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash 702457121, now seen corresponding path program 25 times [2021-08-21 12:52:54,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:54,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727052684] [2021-08-21 12:52:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:54,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:54,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:54,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727052684] [2021-08-21 12:52:54,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727052684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:54,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349540427] [2021-08-21 12:52:54,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:54,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:54,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:54,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:54,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:52:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:52:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:55,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349540427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:55,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:55,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 12:52:55,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392249128] [2021-08-21 12:52:55,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:52:55,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:52:55,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:52:55,131 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:55,173 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-08-21 12:52:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:52:55,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:52:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:55,175 INFO L225 Difference]: With dead ends: 583 [2021-08-21 12:52:55,175 INFO L226 Difference]: Without dead ends: 552 [2021-08-21 12:52:55,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:52:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-21 12:52:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-08-21 12:52:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-08-21 12:52:55,181 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-08-21 12:52:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:55,181 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-08-21 12:52:55,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-08-21 12:52:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:55,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:55,181 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:55,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:55,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:52:55,397 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -498894526, now seen corresponding path program 26 times [2021-08-21 12:52:55,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:55,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674789833] [2021-08-21 12:52:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:55,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:55,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:55,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674789833] [2021-08-21 12:52:55,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674789833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:55,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838186597] [2021-08-21 12:52:55,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:55,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:55,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:55,963 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:55,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:52:56,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-21 12:52:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:52:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:56,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838186597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:56,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:56,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-08-21 12:52:56,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087156063] [2021-08-21 12:52:56,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 12:52:56,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 12:52:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:52:56,472 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:57,852 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-08-21 12:52:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:52:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:57,854 INFO L225 Difference]: With dead ends: 949 [2021-08-21 12:52:57,854 INFO L226 Difference]: Without dead ends: 585 [2021-08-21 12:52:57,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1465.9ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:52:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-21 12:52:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-08-21 12:52:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-08-21 12:52:57,858 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-08-21 12:52:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:57,858 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-08-21 12:52:57,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-08-21 12:52:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 12:52:57,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:57,859 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:57,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:58,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:52:58,076 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:58,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1737217109, now seen corresponding path program 27 times [2021-08-21 12:52:58,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:58,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300193894] [2021-08-21 12:52:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:58,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:58,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:58,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300193894] [2021-08-21 12:52:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300193894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:58,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545359122] [2021-08-21 12:52:58,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:58,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:58,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:58,257 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:58,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:52:58,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 12:52:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:52:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:58,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545359122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:58,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:58,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-08-21 12:52:58,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25226380] [2021-08-21 12:52:58,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:52:58,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:52:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:52:58,730 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:58,768 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-08-21 12:52:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:52:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 12:52:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:58,770 INFO L225 Difference]: With dead ends: 645 [2021-08-21 12:52:58,770 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 12:52:58,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:52:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 12:52:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-08-21 12:52:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-08-21 12:52:58,778 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-08-21 12:52:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:58,778 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-08-21 12:52:58,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-08-21 12:52:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:52:58,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:58,779 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:58,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:58,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:52:58,996 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:58,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1710480330, now seen corresponding path program 28 times [2021-08-21 12:52:58,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:58,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546312730] [2021-08-21 12:52:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:58,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:59,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:59,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546312730] [2021-08-21 12:52:59,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546312730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:59,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670747323] [2021-08-21 12:52:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:59,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:59,624 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:59,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:52:59,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-21 12:52:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:00,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:53:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670747323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:00,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:00,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-08-21 12:53:00,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241414117] [2021-08-21 12:53:00,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:53:00,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:53:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:53:00,153 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:01,515 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-08-21 12:53:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:53:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:53:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:01,517 INFO L225 Difference]: With dead ends: 1059 [2021-08-21 12:53:01,517 INFO L226 Difference]: Without dead ends: 655 [2021-08-21 12:53:01,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1503.3ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:53:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-08-21 12:53:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-08-21 12:53:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-08-21 12:53:01,521 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-08-21 12:53:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:01,521 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-08-21 12:53:01,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-08-21 12:53:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:53:01,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:01,522 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:01,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:01,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:01,736 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:01,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1462204447, now seen corresponding path program 29 times [2021-08-21 12:53:01,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:01,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619512934] [2021-08-21 12:53:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:01,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:01,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:01,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619512934] [2021-08-21 12:53:01,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619512934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:01,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366272457] [2021-08-21 12:53:01,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:53:01,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:01,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:01,907 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:01,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:53:02,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:53:02,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:02,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:53:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:02,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366272457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:02,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:02,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-08-21 12:53:02,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200912003] [2021-08-21 12:53:02,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:53:02,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:02,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:53:02,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:53:02,409 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:02,446 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-08-21 12:53:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:53:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:53:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:02,448 INFO L225 Difference]: With dead ends: 710 [2021-08-21 12:53:02,448 INFO L226 Difference]: Without dead ends: 675 [2021-08-21 12:53:02,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:53:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-08-21 12:53:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-08-21 12:53:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-08-21 12:53:02,455 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-08-21 12:53:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:02,455 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-08-21 12:53:02,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-08-21 12:53:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:53:02,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:02,456 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:02,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 12:53:02,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:02,673 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1015309186, now seen corresponding path program 30 times [2021-08-21 12:53:02,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:02,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436101788] [2021-08-21 12:53:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:02,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:03,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:03,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436101788] [2021-08-21 12:53:03,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436101788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:03,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771340787] [2021-08-21 12:53:03,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:53:03,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:03,361 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:03,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:53:03,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:53:03,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:03,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:53:03,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:05,667 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:53:05,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 12:53:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:05,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771340787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:05,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-08-21 12:53:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520608204] [2021-08-21 12:53:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 12:53:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 12:53:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 12:53:05,681 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:19,694 INFO L93 Difference]: Finished difference Result 5479 states and 10739 transitions. [2021-08-21 12:53:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-08-21 12:53:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:53:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:19,718 INFO L225 Difference]: With dead ends: 5479 [2021-08-21 12:53:19,718 INFO L226 Difference]: Without dead ends: 3672 [2021-08-21 12:53:19,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 14663.1ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-08-21 12:53:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-08-21 12:53:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 595. [2021-08-21 12:53:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0757575757575757) internal successors, (1233), 594 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1233 transitions. [2021-08-21 12:53:19,778 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1233 transitions. Word has length 43 [2021-08-21 12:53:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:19,778 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1233 transitions. [2021-08-21 12:53:19,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1233 transitions. [2021-08-21 12:53:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 12:53:19,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:19,779 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:19,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:19,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 12:53:19,996 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1383356042, now seen corresponding path program 31 times [2021-08-21 12:53:19,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:19,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20665982] [2021-08-21 12:53:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:19,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:20,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:20,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20665982] [2021-08-21 12:53:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20665982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:20,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145545390] [2021-08-21 12:53:20,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:53:20,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:20,711 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:20,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:53:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-21 12:53:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:21,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:53:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:21,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145545390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:21,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:21,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-08-21 12:53:21,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127246641] [2021-08-21 12:53:21,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:21,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:21,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:21,359 INFO L87 Difference]: Start difference. First operand 595 states and 1233 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:23,147 INFO L93 Difference]: Finished difference Result 1255 states and 2466 transitions. [2021-08-21 12:53:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:53:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 12:53:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:23,149 INFO L225 Difference]: With dead ends: 1255 [2021-08-21 12:53:23,149 INFO L226 Difference]: Without dead ends: 805 [2021-08-21 12:53:23,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1896.4ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 12:53:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-08-21 12:53:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 106. [2021-08-21 12:53:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-08-21 12:53:23,154 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-08-21 12:53:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:23,154 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-08-21 12:53:23,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-08-21 12:53:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:53:23,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:23,154 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:23,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:23,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:23,369 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 88713889, now seen corresponding path program 32 times [2021-08-21 12:53:23,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:23,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218671284] [2021-08-21 12:53:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:23,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:23,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:23,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218671284] [2021-08-21 12:53:23,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218671284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:23,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249476418] [2021-08-21 12:53:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:53:23,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:23,621 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:23,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:53:24,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:53:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 12:53:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:24,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249476418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:24,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:24,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-08-21 12:53:24,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221266593] [2021-08-21 12:53:24,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:53:24,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:53:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:53:24,196 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:24,243 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-08-21 12:53:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:53:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:53:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:24,246 INFO L225 Difference]: With dead ends: 849 [2021-08-21 12:53:24,246 INFO L226 Difference]: Without dead ends: 810 [2021-08-21 12:53:24,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:53:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-08-21 12:53:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-08-21 12:53:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-08-21 12:53:24,253 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-08-21 12:53:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:24,253 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-08-21 12:53:24,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-08-21 12:53:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:53:24,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:24,254 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:24,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:24,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:24,469 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash -496185918, now seen corresponding path program 33 times [2021-08-21 12:53:24,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:24,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019576882] [2021-08-21 12:53:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:24,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:25,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:25,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019576882] [2021-08-21 12:53:25,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019576882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:25,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709618899] [2021-08-21 12:53:25,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:53:25,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:25,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:25,338 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:25,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:53:25,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 12:53:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-21 12:53:25,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:25,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:53:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:25,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709618899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:25,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:25,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-08-21 12:53:25,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515469655] [2021-08-21 12:53:25,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 12:53:25,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 12:53:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:53:25,999 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:28,099 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-08-21 12:53:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:53:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:53:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:28,101 INFO L225 Difference]: With dead ends: 1425 [2021-08-21 12:53:28,102 INFO L226 Difference]: Without dead ends: 889 [2021-08-21 12:53:28,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2287.9ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 12:53:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-08-21 12:53:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-08-21 12:53:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-08-21 12:53:28,106 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-08-21 12:53:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:28,106 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-08-21 12:53:28,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-08-21 12:53:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 12:53:28,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:28,107 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:28,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 12:53:28,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 12:53:28,324 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1821183957, now seen corresponding path program 34 times [2021-08-21 12:53:28,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:28,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644703726] [2021-08-21 12:53:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:28,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:28,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:28,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644703726] [2021-08-21 12:53:28,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644703726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:28,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540971395] [2021-08-21 12:53:28,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:53:28,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:28,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:28,592 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:28,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:53:29,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:53:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:53:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:29,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540971395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:29,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:29,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-08-21 12:53:29,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337782083] [2021-08-21 12:53:29,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:53:29,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:53:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:53:29,207 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:29,257 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-08-21 12:53:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:53:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 12:53:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:29,260 INFO L225 Difference]: With dead ends: 923 [2021-08-21 12:53:29,260 INFO L226 Difference]: Without dead ends: 882 [2021-08-21 12:53:29,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:53:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-08-21 12:53:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-08-21 12:53:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-08-21 12:53:29,267 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-08-21 12:53:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:29,267 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-08-21 12:53:29,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-08-21 12:53:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 12:53:29,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:29,269 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:29,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:29,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:53:29,486 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1921782090, now seen corresponding path program 35 times [2021-08-21 12:53:29,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:29,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302791514] [2021-08-21 12:53:29,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:29,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:30,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:30,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302791514] [2021-08-21 12:53:30,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302791514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:30,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036770747] [2021-08-21 12:53:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:53:30,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:30,459 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:30,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:53:30,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 12:53:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 12:53:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:33,471 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:53:33,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 12:53:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:33,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036770747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:33,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:33,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-08-21 12:53:33,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708130142] [2021-08-21 12:53:33,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-21 12:53:33,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-21 12:53:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 12:53:33,486 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:54,409 INFO L93 Difference]: Finished difference Result 8032 states and 15779 transitions. [2021-08-21 12:53:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-08-21 12:53:54,410 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 12:53:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:54,425 INFO L225 Difference]: With dead ends: 8032 [2021-08-21 12:53:54,425 INFO L226 Difference]: Without dead ends: 5607 [2021-08-21 12:53:54,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 21794.2ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-08-21 12:53:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-08-21 12:53:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 787. [2021-08-21 12:53:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.068702290076336) internal successors, (1626), 786 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1626 transitions. [2021-08-21 12:53:54,451 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1626 transitions. Word has length 49 [2021-08-21 12:53:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:54,452 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1626 transitions. [2021-08-21 12:53:54,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1626 transitions. [2021-08-21 12:53:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:53:54,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:54,453 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:54,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:54,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:53:54,669 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1525368830, now seen corresponding path program 36 times [2021-08-21 12:53:54,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:54,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163207565] [2021-08-21 12:53:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:54,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:55,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:55,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163207565] [2021-08-21 12:53:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163207565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:55,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321260147] [2021-08-21 12:53:55,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:53:55,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:55,697 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:55,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:53:56,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 12:53:56,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:56,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:53:56,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:58,724 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:53:58,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 12:53:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 210 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:58,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321260147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:58,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:58,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2021-08-21 12:53:58,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549195601] [2021-08-21 12:53:58,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-21 12:53:58,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-21 12:53:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=6450, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 12:53:58,735 INFO L87 Difference]: Start difference. First operand 787 states and 1626 transitions. Second operand has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:26,417 INFO L93 Difference]: Finished difference Result 8987 states and 17664 transitions. [2021-08-21 12:54:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-08-21 12:54:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:54:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:26,439 INFO L225 Difference]: With dead ends: 8987 [2021-08-21 12:54:26,439 INFO L226 Difference]: Without dead ends: 6378 [2021-08-21 12:54:26,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48420 ImplicationChecksByTransitivity, 28095.6ms TimeCoverageRelationStatistics Valid=24975, Invalid=120567, Unknown=0, NotChecked=0, Total=145542 [2021-08-21 12:54:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6378 states. [2021-08-21 12:54:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6378 to 857. [2021-08-21 12:54:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.066588785046729) internal successors, (1769), 856 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1769 transitions. [2021-08-21 12:54:26,529 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1769 transitions. Word has length 51 [2021-08-21 12:54:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:26,529 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1769 transitions. [2021-08-21 12:54:26,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1769 transitions. [2021-08-21 12:54:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:54:26,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:26,530 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:26,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:26,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:26,731 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2121468938, now seen corresponding path program 37 times [2021-08-21 12:54:26,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:26,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429165189] [2021-08-21 12:54:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:26,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:27,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:27,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429165189] [2021-08-21 12:54:27,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429165189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:27,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239301506] [2021-08-21 12:54:27,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:54:27,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:27,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:27,529 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:27,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:54:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:28,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-21 12:54:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:28,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:54:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:28,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239301506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:28,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:28,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-08-21 12:54:28,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109671013] [2021-08-21 12:54:28,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 12:54:28,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 12:54:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:54:28,341 INFO L87 Difference]: Start difference. First operand 857 states and 1769 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:31,085 INFO L93 Difference]: Finished difference Result 1795 states and 3538 transitions. [2021-08-21 12:54:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 12:54:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:54:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:31,101 INFO L225 Difference]: With dead ends: 1795 [2021-08-21 12:54:31,101 INFO L226 Difference]: Without dead ends: 1157 [2021-08-21 12:54:31,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2709.7ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 12:54:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-08-21 12:54:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 126. [2021-08-21 12:54:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-08-21 12:54:31,120 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-08-21 12:54:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:31,120 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-08-21 12:54:31,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-08-21 12:54:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 12:54:31,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:31,121 INFO L512 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:31,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:31,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:54:31,338 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1317949407, now seen corresponding path program 38 times [2021-08-21 12:54:31,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:31,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275742928] [2021-08-21 12:54:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:31,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:31,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:31,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275742928] [2021-08-21 12:54:31,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275742928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:31,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461826118] [2021-08-21 12:54:31,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:54:31,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:31,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:31,633 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:31,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:54:32,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:54:32,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 12:54:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:32,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461826118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:32,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:32,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-08-21 12:54:32,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97666903] [2021-08-21 12:54:32,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:54:32,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:32,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:54:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:54:32,383 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:32,440 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-08-21 12:54:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:54:32,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 12:54:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:32,442 INFO L225 Difference]: With dead ends: 1163 [2021-08-21 12:54:32,442 INFO L226 Difference]: Without dead ends: 1116 [2021-08-21 12:54:32,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:54:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-21 12:54:32,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-08-21 12:54:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-08-21 12:54:32,451 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-08-21 12:54:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:32,451 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-08-21 12:54:32,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-08-21 12:54:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:54:32,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:32,453 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:32,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:32,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:54:32,670 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash 865346114, now seen corresponding path program 39 times [2021-08-21 12:54:32,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:32,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845882407] [2021-08-21 12:54:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:32,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:33,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:33,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845882407] [2021-08-21 12:54:33,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845882407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:33,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322200580] [2021-08-21 12:54:33,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:54:33,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:33,684 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:33,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:54:34,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 12:54:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-21 12:54:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:34,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:54:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:34,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322200580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:34,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:34,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-08-21 12:54:34,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505329861] [2021-08-21 12:54:34,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 12:54:34,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 12:54:34,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:54:34,528 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:37,158 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-08-21 12:54:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:54:37,158 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:54:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:37,185 INFO L225 Difference]: With dead ends: 1997 [2021-08-21 12:54:37,185 INFO L226 Difference]: Without dead ends: 1257 [2021-08-21 12:54:37,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2796.2ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 12:54:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-08-21 12:54:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-08-21 12:54:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.9692307692307693) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-08-21 12:54:37,191 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-08-21 12:54:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:37,191 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-08-21 12:54:37,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-08-21 12:54:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:54:37,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:37,192 INFO L512 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:37,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:37,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:37,392 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1079003989, now seen corresponding path program 40 times [2021-08-21 12:54:37,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:37,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727402273] [2021-08-21 12:54:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:37,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:37,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:37,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727402273] [2021-08-21 12:54:37,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727402273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:37,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273584829] [2021-08-21 12:54:37,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:54:37,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:37,661 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:37,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:54:38,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:54:38,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:54:38,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:38,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273584829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:38,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:38,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-08-21 12:54:38,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069440208] [2021-08-21 12:54:38,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:54:38,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:54:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:54:38,461 INFO L87 Difference]: Start difference. First operand 131 states and 256 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:38,537 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-08-21 12:54:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:54:38,538 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:54:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:38,539 INFO L225 Difference]: With dead ends: 1249 [2021-08-21 12:54:38,539 INFO L226 Difference]: Without dead ends: 1200 [2021-08-21 12:54:38,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:54:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-08-21 12:54:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-08-21 12:54:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.060663507109005) internal successors, (2174), 1055 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-08-21 12:54:38,549 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-08-21 12:54:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-08-21 12:54:38,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-08-21 12:54:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 12:54:38,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:38,551 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:38,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:38,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 12:54:38,764 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:38,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:38,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1013008074, now seen corresponding path program 41 times [2021-08-21 12:54:38,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:38,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215875279] [2021-08-21 12:54:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:38,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:40,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:40,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215875279] [2021-08-21 12:54:40,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215875279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:40,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930376915] [2021-08-21 12:54:40,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:54:40,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:40,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:40,045 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:40,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:54:40,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-21 12:54:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 12:54:40,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:43,234 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 12:54:43,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 18 [2021-08-21 12:54:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 276 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:43,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930376915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:43,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:43,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-08-21 12:54:43,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296939474] [2021-08-21 12:54:43,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-21 12:54:43,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-21 12:54:43,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1323, Invalid=8379, Unknown=0, NotChecked=0, Total=9702 [2021-08-21 12:54:43,245 INFO L87 Difference]: Start difference. First operand 1056 states and 2174 transitions. Second operand has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:19,751 INFO L93 Difference]: Finished difference Result 12514 states and 24641 transitions. [2021-08-21 12:55:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-08-21 12:55:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 12:55:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:19,794 INFO L225 Difference]: With dead ends: 12514 [2021-08-21 12:55:19,794 INFO L226 Difference]: Without dead ends: 9125 [2021-08-21 12:55:19,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76712 ImplicationChecksByTransitivity, 36616.7ms TimeCoverageRelationStatistics Valid=37944, Invalid=184368, Unknown=0, NotChecked=0, Total=222312 [2021-08-21 12:55:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2021-08-21 12:55:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 1085. [2021-08-21 12:55:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.0608856088560885) internal successors, (2234), 1084 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2234 transitions. [2021-08-21 12:55:19,884 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2234 transitions. Word has length 57 [2021-08-21 12:55:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:19,886 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2234 transitions. [2021-08-21 12:55:19,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2234 transitions. [2021-08-21 12:55:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:19,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:19,887 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:19,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:20,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:20,088 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1694299006, now seen corresponding path program 42 times [2021-08-21 12:55:20,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:20,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199199120] [2021-08-21 12:55:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:20,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:21,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:21,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199199120] [2021-08-21 12:55:21,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199199120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:21,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45492666] [2021-08-21 12:55:21,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:55:21,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:21,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:21,578 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:21,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:55:22,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 12:55:22,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:22,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-08-21 12:55:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:22,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:55:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:22,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45492666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:22,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:22,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-08-21 12:55:22,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313476439] [2021-08-21 12:55:22,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 12:55:22,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 12:55:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:55:22,547 INFO L87 Difference]: Start difference. First operand 1085 states and 2234 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:26,295 INFO L93 Difference]: Finished difference Result 2263 states and 4468 transitions. [2021-08-21 12:55:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:55:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:26,310 INFO L225 Difference]: With dead ends: 2263 [2021-08-21 12:55:26,310 INFO L226 Difference]: Without dead ends: 1463 [2021-08-21 12:55:26,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4159.1ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-08-21 12:55:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-08-21 12:55:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 141. [2021-08-21 12:55:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-08-21 12:55:26,316 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-08-21 12:55:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:26,316 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-08-21 12:55:26,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-08-21 12:55:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 12:55:26,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:26,333 INFO L512 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:26,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:26,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:26,533 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash -960583403, now seen corresponding path program 43 times [2021-08-21 12:55:26,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:26,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862781436] [2021-08-21 12:55:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:26,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:26,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:26,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862781436] [2021-08-21 12:55:26,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862781436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:26,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437192696] [2021-08-21 12:55:26,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:55:26,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:26,936 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:26,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:55:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:27,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:55:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:27,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437192696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:27,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:27,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-08-21 12:55:27,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467709096] [2021-08-21 12:55:27,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:55:27,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:55:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:55:27,831 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:27,901 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-08-21 12:55:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:55:27,901 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-21 12:55:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:27,903 INFO L225 Difference]: With dead ends: 1430 [2021-08-21 12:55:27,903 INFO L226 Difference]: Without dead ends: 1377 [2021-08-21 12:55:27,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:55:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-08-21 12:55:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-08-21 12:55:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-08-21 12:55:27,914 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-08-21 12:55:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:27,914 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-08-21 12:55:27,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-08-21 12:55:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 12:55:27,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:27,915 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:27,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:28,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 12:55:28,129 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash -9355658, now seen corresponding path program 44 times [2021-08-21 12:55:28,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:28,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581220550] [2021-08-21 12:55:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:28,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:29,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:29,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581220550] [2021-08-21 12:55:29,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581220550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:29,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796584786] [2021-08-21 12:55:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:55:29,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:29,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:29,635 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:29,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:55:30,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:55:30,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:30,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-08-21 12:55:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:30,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:55:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:30,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796584786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:30,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:30,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-08-21 12:55:30,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266047396] [2021-08-21 12:55:30,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 12:55:30,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:30,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 12:55:30,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:55:30,653 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:34,931 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-08-21 12:55:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 12:55:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 12:55:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:34,934 INFO L225 Difference]: With dead ends: 2489 [2021-08-21 12:55:34,934 INFO L226 Difference]: Without dead ends: 1575 [2021-08-21 12:55:34,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4584.0ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-08-21 12:55:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-08-21 12:55:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-08-21 12:55:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-08-21 12:55:34,940 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-08-21 12:55:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:34,941 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-08-21 12:55:34,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-08-21 12:55:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 12:55:34,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:34,941 INFO L512 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:34,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 12:55:35,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:55:35,159 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash -266947167, now seen corresponding path program 45 times [2021-08-21 12:55:35,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:35,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477109824] [2021-08-21 12:55:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:35,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:35,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:35,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477109824] [2021-08-21 12:55:35,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477109824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:35,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479084904] [2021-08-21 12:55:35,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:55:35,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:35,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:35,667 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:35,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:55:36,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-21 12:55:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 12:55:36,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479084904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:36,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:36,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-08-21 12:55:36,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25504992] [2021-08-21 12:55:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:55:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:55:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:55:36,585 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:36,659 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-08-21 12:55:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:55:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 12:55:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:36,661 INFO L225 Difference]: With dead ends: 1525 [2021-08-21 12:55:36,661 INFO L226 Difference]: Without dead ends: 1470 [2021-08-21 12:55:36,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:55:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-08-21 12:55:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-08-21 12:55:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-08-21 12:55:36,673 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-08-21 12:55:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:36,673 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-08-21 12:55:36,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-08-21 12:55:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:55:36,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:36,674 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:36,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:36,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:55:36,893 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash -965118270, now seen corresponding path program 46 times [2021-08-21 12:55:36,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:36,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211709375] [2021-08-21 12:55:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:36,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:38,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:38,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211709375] [2021-08-21 12:55:38,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211709375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:38,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960363715] [2021-08-21 12:55:38,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:55:38,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:38,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:38,431 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:38,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:55:39,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:55:39,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-08-21 12:55:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:39,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:55:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:39,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960363715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:39,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:39,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-08-21 12:55:39,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819868280] [2021-08-21 12:55:39,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-21 12:55:39,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-21 12:55:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:55:39,583 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:43,450 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-08-21 12:55:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:55:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 12:55:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:43,453 INFO L225 Difference]: With dead ends: 2665 [2021-08-21 12:55:43,453 INFO L226 Difference]: Without dead ends: 1689 [2021-08-21 12:55:43,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4294.0ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 12:55:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-08-21 12:55:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-08-21 12:55:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-08-21 12:55:43,459 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-08-21 12:55:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:43,460 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-08-21 12:55:43,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-08-21 12:55:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-21 12:55:43,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:43,460 INFO L512 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:43,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:43,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:43,669 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash 169182933, now seen corresponding path program 47 times [2021-08-21 12:55:43,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:43,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295978828] [2021-08-21 12:55:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:43,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:44,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:44,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295978828] [2021-08-21 12:55:44,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295978828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:44,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045886066] [2021-08-21 12:55:44,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:55:44,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:44,185 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:44,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:55:45,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-21 12:55:45,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 12:55:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045886066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:45,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:45,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-08-21 12:55:45,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21484192] [2021-08-21 12:55:45,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:55:45,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:55:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:55:45,249 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:45,326 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-08-21 12:55:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:55:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-21 12:55:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:45,328 INFO L225 Difference]: With dead ends: 1623 [2021-08-21 12:55:45,328 INFO L226 Difference]: Without dead ends: 1566 [2021-08-21 12:55:45,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:55:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-08-21 12:55:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-08-21 12:55:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-08-21 12:55:45,340 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-08-21 12:55:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:45,340 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-08-21 12:55:45,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-08-21 12:55:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:55:45,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:45,342 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:45,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:55:45,561 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash -758348874, now seen corresponding path program 48 times [2021-08-21 12:55:45,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:45,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412374811] [2021-08-21 12:55:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:45,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:47,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412374811] [2021-08-21 12:55:47,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412374811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80033519] [2021-08-21 12:55:47,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:55:47,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:47,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:47,223 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:47,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:55:48,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-21 12:55:48,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 117 conjunts are in the unsatisfiable core [2021-08-21 12:55:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:55:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80033519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:48,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:48,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-08-21 12:55:48,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192435846] [2021-08-21 12:55:48,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-21 12:55:48,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-21 12:55:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:55:48,408 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:52,874 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-08-21 12:55:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:55:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 12:55:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:52,876 INFO L225 Difference]: With dead ends: 2847 [2021-08-21 12:55:52,876 INFO L226 Difference]: Without dead ends: 1807 [2021-08-21 12:55:52,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 4884.7ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-08-21 12:55:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-08-21 12:55:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-08-21 12:55:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-08-21 12:55:52,883 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-08-21 12:55:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-08-21 12:55:52,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-08-21 12:55:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:55:52,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:52,884 INFO L512 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:52,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:53,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:55:53,097 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2010900383, now seen corresponding path program 49 times [2021-08-21 12:55:53,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:53,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654168646] [2021-08-21 12:55:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:53,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:53,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:53,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654168646] [2021-08-21 12:55:53,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654168646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:53,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498672297] [2021-08-21 12:55:53,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:55:53,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:53,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:53,585 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:53,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:55:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:54,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:55:54,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:54,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498672297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:54,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:54,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-08-21 12:55:54,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213883651] [2021-08-21 12:55:54,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:55:54,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:55:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:55:54,722 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:54,806 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-08-21 12:55:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:55:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:55:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:54,809 INFO L225 Difference]: With dead ends: 1724 [2021-08-21 12:55:54,809 INFO L226 Difference]: Without dead ends: 1665 [2021-08-21 12:55:54,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:55:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-08-21 12:55:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-08-21 12:55:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-08-21 12:55:54,847 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-08-21 12:55:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:54,847 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-08-21 12:55:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-08-21 12:55:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 12:55:54,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:54,862 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:54,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:55,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:55,062 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash -15769342, now seen corresponding path program 50 times [2021-08-21 12:55:55,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:55,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794139957] [2021-08-21 12:55:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:55,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:56,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:56,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794139957] [2021-08-21 12:55:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794139957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:56,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189866054] [2021-08-21 12:55:56,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:55:56,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:56,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:56,784 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:56,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:55:57,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:55:57,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-08-21 12:55:57,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:55:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:58,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189866054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:58,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:58,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-08-21 12:55:58,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532844815] [2021-08-21 12:55:58,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-21 12:55:58,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-21 12:55:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:55:58,064 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:03,358 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-08-21 12:56:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 12:56:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 12:56:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:03,360 INFO L225 Difference]: With dead ends: 3035 [2021-08-21 12:56:03,360 INFO L226 Difference]: Without dead ends: 1929 [2021-08-21 12:56:03,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5599.1ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-08-21 12:56:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-08-21 12:56:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-08-21 12:56:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.975) internal successors, (316), 160 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-08-21 12:56:03,367 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-08-21 12:56:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:03,367 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-08-21 12:56:03,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-08-21 12:56:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-21 12:56:03,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:03,367 INFO L512 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:03,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:03,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 12:56:03,585 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:03,585 INFO L82 PathProgramCache]: Analyzing trace with hash -465771371, now seen corresponding path program 51 times [2021-08-21 12:56:03,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:03,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477196391] [2021-08-21 12:56:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:03,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:04,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477196391] [2021-08-21 12:56:04,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477196391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658752384] [2021-08-21 12:56:04,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:56:04,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:04,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:04,102 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:56:05,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-21 12:56:05,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-21 12:56:05,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658752384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:05,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:05,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-08-21 12:56:05,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084036668] [2021-08-21 12:56:05,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 12:56:05,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 12:56:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:56:05,289 INFO L87 Difference]: Start difference. First operand 161 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:05,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:05,375 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-08-21 12:56:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:56:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-08-21 12:56:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:05,377 INFO L225 Difference]: With dead ends: 1828 [2021-08-21 12:56:05,377 INFO L226 Difference]: Without dead ends: 1767 [2021-08-21 12:56:05,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:56:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-08-21 12:56:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-08-21 12:56:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.051702395964691) internal successors, (3254), 1586 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-08-21 12:56:05,391 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-08-21 12:56:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:05,391 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-08-21 12:56:05,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-08-21 12:56:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-21 12:56:05,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:05,392 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:05,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:05,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:05,609 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1299745014, now seen corresponding path program 52 times [2021-08-21 12:56:05,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:05,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183291022] [2021-08-21 12:56:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:05,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:07,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:07,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183291022] [2021-08-21 12:56:07,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183291022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:07,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599096508] [2021-08-21 12:56:07,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:56:07,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:07,484 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:07,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:56:08,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:56:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:08,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-08-21 12:56:08,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:08,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:56:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:08,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599096508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:08,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:08,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-08-21 12:56:08,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202673220] [2021-08-21 12:56:08,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 12:56:08,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 12:56:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:56:08,809 INFO L87 Difference]: Start difference. First operand 1587 states and 3254 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:14,175 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-08-21 12:56:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:56:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-08-21 12:56:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:14,177 INFO L225 Difference]: With dead ends: 3229 [2021-08-21 12:56:14,177 INFO L226 Difference]: Without dead ends: 2055 [2021-08-21 12:56:14,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 5681.5ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-08-21 12:56:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-08-21 12:56:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-08-21 12:56:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 165 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-08-21 12:56:14,185 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-08-21 12:56:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:14,185 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-08-21 12:56:14,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-08-21 12:56:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 12:56:14,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:14,185 INFO L512 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:14,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:14,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 12:56:14,404 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1660468001, now seen corresponding path program 53 times [2021-08-21 12:56:14,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:14,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949470390] [2021-08-21 12:56:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:14,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:14,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:14,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949470390] [2021-08-21 12:56:14,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949470390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:14,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266723837] [2021-08-21 12:56:14,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:56:14,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:14,839 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:14,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:56:15,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 12:56:15,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 12:56:15,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:16,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266723837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:16,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:16,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-08-21 12:56:16,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406067296] [2021-08-21 12:56:16,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:56:16,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:56:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:56:16,066 INFO L87 Difference]: Start difference. First operand 166 states and 326 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:16,156 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-08-21 12:56:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:56:16,156 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-21 12:56:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:16,159 INFO L225 Difference]: With dead ends: 1935 [2021-08-21 12:56:16,159 INFO L226 Difference]: Without dead ends: 1872 [2021-08-21 12:56:16,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:56:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-08-21 12:56:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-08-21 12:56:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.050445103857567) internal successors, (3455), 1685 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-08-21 12:56:16,172 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-08-21 12:56:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:16,173 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-08-21 12:56:16,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-08-21 12:56:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-21 12:56:16,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:16,175 INFO L512 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:16,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:16,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:56:16,393 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1809632066, now seen corresponding path program 54 times [2021-08-21 12:56:16,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:16,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601743083] [2021-08-21 12:56:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:16,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:18,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601743083] [2021-08-21 12:56:18,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601743083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123980781] [2021-08-21 12:56:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:56:18,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:18,375 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:18,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:56:19,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-08-21 12:56:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-08-21 12:56:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:56:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:19,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123980781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:19,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:19,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-08-21 12:56:19,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583093880] [2021-08-21 12:56:19,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-08-21 12:56:19,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:19,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-08-21 12:56:19,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:56:19,738 INFO L87 Difference]: Start difference. First operand 1686 states and 3455 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:25,302 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-08-21 12:56:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 12:56:25,302 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-08-21 12:56:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:25,305 INFO L225 Difference]: With dead ends: 3429 [2021-08-21 12:56:25,305 INFO L226 Difference]: Without dead ends: 2185 [2021-08-21 12:56:25,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 5908.4ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-08-21 12:56:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-08-21 12:56:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-08-21 12:56:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-08-21 12:56:25,312 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-08-21 12:56:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:25,312 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-08-21 12:56:25,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-08-21 12:56:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 12:56:25,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:25,313 INFO L512 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:25,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:25,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:25,529 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:25,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:25,529 INFO L82 PathProgramCache]: Analyzing trace with hash 287097429, now seen corresponding path program 55 times [2021-08-21 12:56:25,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:25,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130753160] [2021-08-21 12:56:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:25,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:26,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:26,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130753160] [2021-08-21 12:56:26,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130753160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:26,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432784701] [2021-08-21 12:56:26,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:56:26,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:26,011 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:26,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:56:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-21 12:56:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:27,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432784701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:27,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:27,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-08-21 12:56:27,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114806428] [2021-08-21 12:56:27,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:56:27,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:56:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:56:27,291 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:27,400 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-08-21 12:56:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:56:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 12:56:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:27,403 INFO L225 Difference]: With dead ends: 2045 [2021-08-21 12:56:27,403 INFO L226 Difference]: Without dead ends: 1980 [2021-08-21 12:56:27,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:56:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-08-21 12:56:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-08-21 12:56:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-08-21 12:56:27,418 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-08-21 12:56:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:27,418 INFO L470 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-08-21 12:56:27,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-08-21 12:56:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-21 12:56:27,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:27,420 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:27,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:27,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:27,633 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1899843126, now seen corresponding path program 56 times [2021-08-21 12:56:27,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:27,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879467662] [2021-08-21 12:56:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:27,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:29,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:29,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879467662] [2021-08-21 12:56:29,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879467662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:29,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981044146] [2021-08-21 12:56:29,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:56:29,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:29,702 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:29,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:56:30,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:56:30,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-08-21 12:56:30,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:31,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:56:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:31,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981044146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:31,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:31,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-08-21 12:56:31,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228773614] [2021-08-21 12:56:31,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-21 12:56:31,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-21 12:56:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:56:31,164 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:37,406 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-08-21 12:56:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 12:56:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-21 12:56:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:37,409 INFO L225 Difference]: With dead ends: 3635 [2021-08-21 12:56:37,409 INFO L226 Difference]: Without dead ends: 2319 [2021-08-21 12:56:37,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6649.1ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-08-21 12:56:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-08-21 12:56:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-08-21 12:56:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-08-21 12:56:37,416 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-08-21 12:56:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:37,417 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-08-21 12:56:37,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-08-21 12:56:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-21 12:56:37,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:37,417 INFO L512 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:37,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:37,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:37,633 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1211327007, now seen corresponding path program 57 times [2021-08-21 12:56:37,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:37,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161933787] [2021-08-21 12:56:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:37,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:38,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:38,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161933787] [2021-08-21 12:56:38,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161933787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:38,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145264119] [2021-08-21 12:56:38,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:56:38,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:38,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:38,145 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:38,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:56:39,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-21 12:56:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 12:56:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:39,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145264119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:39,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:39,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-08-21 12:56:39,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199096564] [2021-08-21 12:56:39,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:56:39,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:56:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:56:39,505 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:39,606 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-08-21 12:56:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:56:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-08-21 12:56:39,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:39,608 INFO L225 Difference]: With dead ends: 2158 [2021-08-21 12:56:39,608 INFO L226 Difference]: Without dead ends: 2091 [2021-08-21 12:56:39,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:56:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-08-21 12:56:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-08-21 12:56:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-08-21 12:56:39,624 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-08-21 12:56:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:39,624 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-08-21 12:56:39,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-08-21 12:56:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:56:39,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:39,626 INFO L512 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:39,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:39,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 12:56:39,828 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:39,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:39,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1845906046, now seen corresponding path program 58 times [2021-08-21 12:56:39,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:39,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263350781] [2021-08-21 12:56:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:39,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:42,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:42,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263350781] [2021-08-21 12:56:42,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263350781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:42,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992056608] [2021-08-21 12:56:42,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:56:42,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:42,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:42,022 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:42,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:56:43,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:56:43,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-08-21 12:56:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:43,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:56:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:43,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992056608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:43,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:43,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-08-21 12:56:43,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940205514] [2021-08-21 12:56:43,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 12:56:43,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 12:56:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:56:43,541 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:50,097 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-08-21 12:56:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 12:56:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:56:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:50,100 INFO L225 Difference]: With dead ends: 3847 [2021-08-21 12:56:50,100 INFO L226 Difference]: Without dead ends: 2457 [2021-08-21 12:56:50,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 6958.5ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-08-21 12:56:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-08-21 12:56:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-08-21 12:56:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-08-21 12:56:50,108 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-08-21 12:56:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:50,108 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-08-21 12:56:50,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-08-21 12:56:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:56:50,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:50,109 INFO L512 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:50,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:50,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:56:50,325 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:50,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1365434347, now seen corresponding path program 59 times [2021-08-21 12:56:50,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:50,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565682977] [2021-08-21 12:56:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:50,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:50,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:50,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565682977] [2021-08-21 12:56:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565682977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:50,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262957200] [2021-08-21 12:56:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:56:50,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:50,922 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:50,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:56:52,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-21 12:56:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-21 12:56:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262957200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:52,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:52,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-08-21 12:56:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181730516] [2021-08-21 12:56:52,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:56:52,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:56:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:56:52,384 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:52,491 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-08-21 12:56:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:56:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:56:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:52,494 INFO L225 Difference]: With dead ends: 2274 [2021-08-21 12:56:52,494 INFO L226 Difference]: Without dead ends: 2205 [2021-08-21 12:56:52,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:56:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-08-21 12:56:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-08-21 12:56:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-08-21 12:56:52,510 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-08-21 12:56:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:52,510 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-08-21 12:56:52,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-08-21 12:56:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-21 12:56:52,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:52,512 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:52,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:52,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:52,732 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:52,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1310534794, now seen corresponding path program 60 times [2021-08-21 12:56:52,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:52,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008536584] [2021-08-21 12:56:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:52,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:55,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:55,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008536584] [2021-08-21 12:56:55,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008536584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:55,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518349230] [2021-08-21 12:56:55,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:56:55,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:55,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:55,060 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:55,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:56:56,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 12:56:56,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:56,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 141 conjunts are in the unsatisfiable core [2021-08-21 12:56:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:56,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:56:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:56,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518349230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:56,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:56,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-08-21 12:56:56,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299742645] [2021-08-21 12:56:56,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 12:56:56,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 12:56:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 12:56:56,427 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:02,476 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-08-21 12:57:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-21 12:57:02,477 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-08-21 12:57:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:02,480 INFO L225 Difference]: With dead ends: 4065 [2021-08-21 12:57:02,480 INFO L226 Difference]: Without dead ends: 2599 [2021-08-21 12:57:02,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 6866.8ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-08-21 12:57:02,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-08-21 12:57:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-08-21 12:57:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-08-21 12:57:02,489 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-08-21 12:57:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:02,489 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-08-21 12:57:02,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-08-21 12:57:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-21 12:57:02,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:02,489 INFO L512 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:02,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:02,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:02,705 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1948794719, now seen corresponding path program 61 times [2021-08-21 12:57:02,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:02,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159532533] [2021-08-21 12:57:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:02,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:03,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:03,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159532533] [2021-08-21 12:57:03,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159532533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:03,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874557113] [2021-08-21 12:57:03,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:03,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:03,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:03,270 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:03,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:57:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 12:57:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:04,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874557113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:04,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:04,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-08-21 12:57:04,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899482407] [2021-08-21 12:57:04,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:57:04,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:57:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:57:04,844 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:04,964 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-08-21 12:57:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:57:04,965 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-08-21 12:57:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:04,967 INFO L225 Difference]: With dead ends: 2393 [2021-08-21 12:57:04,967 INFO L226 Difference]: Without dead ends: 2322 [2021-08-21 12:57:04,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:57:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-08-21 12:57:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-08-21 12:57:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-08-21 12:57:04,984 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-08-21 12:57:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:04,984 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-08-21 12:57:04,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-08-21 12:57:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 12:57:04,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:04,986 INFO L512 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:05,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:05,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:05,202 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -729931838, now seen corresponding path program 62 times [2021-08-21 12:57:05,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:05,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089989976] [2021-08-21 12:57:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:05,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:07,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:07,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089989976] [2021-08-21 12:57:07,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089989976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:07,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874841110] [2021-08-21 12:57:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:07,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:07,673 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:07,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:57:08,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:08,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-08-21 12:57:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:09,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:57:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:09,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874841110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:09,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:09,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-08-21 12:57:09,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747287076] [2021-08-21 12:57:09,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 12:57:09,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 12:57:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 12:57:09,334 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:17,083 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-08-21 12:57:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 12:57:17,083 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-21 12:57:17,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:17,086 INFO L225 Difference]: With dead ends: 4289 [2021-08-21 12:57:17,087 INFO L226 Difference]: Without dead ends: 2745 [2021-08-21 12:57:17,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8152.5ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-08-21 12:57:17,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-08-21 12:57:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-08-21 12:57:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-08-21 12:57:17,095 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-08-21 12:57:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:17,095 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-08-21 12:57:17,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-08-21 12:57:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 12:57:17,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:17,096 INFO L512 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:17,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:17,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:17,316 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1129972267, now seen corresponding path program 63 times [2021-08-21 12:57:17,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:17,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828420800] [2021-08-21 12:57:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:17,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:17,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828420800] [2021-08-21 12:57:17,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828420800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172042404] [2021-08-21 12:57:17,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:17,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:17,827 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:17,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:57:19,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-21 12:57:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 12:57:19,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172042404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:19,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:19,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-08-21 12:57:19,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550914371] [2021-08-21 12:57:19,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:57:19,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:57:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:57:19,396 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:19,501 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-08-21 12:57:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:57:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 12:57:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:19,504 INFO L225 Difference]: With dead ends: 2515 [2021-08-21 12:57:19,504 INFO L226 Difference]: Without dead ends: 2442 [2021-08-21 12:57:19,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:57:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-08-21 12:57:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-08-21 12:57:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-08-21 12:57:19,521 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-08-21 12:57:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:19,521 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-08-21 12:57:19,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-08-21 12:57:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-21 12:57:19,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:19,523 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:19,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:19,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:57:19,745 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1966151862, now seen corresponding path program 64 times [2021-08-21 12:57:19,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:19,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880292727] [2021-08-21 12:57:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:19,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:21,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:21,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880292727] [2021-08-21 12:57:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880292727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:21,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490010981] [2021-08-21 12:57:21,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:21,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:21,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:21,519 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:21,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:57:22,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:22,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-08-21 12:57:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:23,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:57:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490010981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:23,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:23,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-08-21 12:57:23,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060463160] [2021-08-21 12:57:23,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-21 12:57:23,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-21 12:57:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 12:57:23,164 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:31,385 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-08-21 12:57:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:57:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-08-21 12:57:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:31,388 INFO L225 Difference]: With dead ends: 4519 [2021-08-21 12:57:31,388 INFO L226 Difference]: Without dead ends: 2895 [2021-08-21 12:57:31,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 7953.6ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-08-21 12:57:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-08-21 12:57:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-08-21 12:57:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-08-21 12:57:31,397 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-08-21 12:57:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-08-21 12:57:31,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-08-21 12:57:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-21 12:57:31,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:31,398 INFO L512 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:31,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:31,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:31,618 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash 844243809, now seen corresponding path program 65 times [2021-08-21 12:57:31,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:31,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41019018] [2021-08-21 12:57:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:31,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:32,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:32,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41019018] [2021-08-21 12:57:32,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41019018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:32,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033039772] [2021-08-21 12:57:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:32,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:32,085 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:32,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:57:33,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-21 12:57:33,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-21 12:57:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:33,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033039772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:33,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:33,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-08-21 12:57:33,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539558923] [2021-08-21 12:57:33,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:57:33,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:57:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:57:33,727 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:33,852 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-08-21 12:57:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:57:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-21 12:57:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:33,855 INFO L225 Difference]: With dead ends: 2640 [2021-08-21 12:57:33,855 INFO L226 Difference]: Without dead ends: 2565 [2021-08-21 12:57:33,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:57:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-08-21 12:57:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-08-21 12:57:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-08-21 12:57:33,872 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-08-21 12:57:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-08-21 12:57:33,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-08-21 12:57:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-21 12:57:33,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:33,874 INFO L512 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:33,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 12:57:34,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 12:57:34,089 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:34,089 INFO L82 PathProgramCache]: Analyzing trace with hash -192804350, now seen corresponding path program 66 times [2021-08-21 12:57:34,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:34,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340072276] [2021-08-21 12:57:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:34,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:36,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:36,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340072276] [2021-08-21 12:57:36,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340072276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:36,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638265614] [2021-08-21 12:57:36,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:36,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:36,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:36,684 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:36,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:57:38,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-21 12:57:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 12:57:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:45,099 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:57:45,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 12:57:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 666 proven. 740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:45,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638265614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:45,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:45,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 150 [2021-08-21 12:57:45,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175299654] [2021-08-21 12:57:45,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-08-21 12:57:45,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-08-21 12:57:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3000, Invalid=19650, Unknown=0, NotChecked=0, Total=22650 [2021-08-21 12:57:45,115 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 151 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:15,183 INFO L93 Difference]: Finished difference Result 37799 states and 74769 transitions. [2021-08-21 13:01:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 855 states. [2021-08-21 13:01:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-08-21 13:01:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:15,228 INFO L225 Difference]: With dead ends: 37799 [2021-08-21 13:01:15,228 INFO L226 Difference]: Without dead ends: 30172 [2021-08-21 13:01:15,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 964 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356620 ImplicationChecksByTransitivity, 202417.7ms TimeCoverageRelationStatistics Valid=157219, Invalid=774971, Unknown=0, NotChecked=0, Total=932190 [2021-08-21 13:01:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30172 states. [2021-08-21 13:01:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30172 to 2385. [2021-08-21 13:01:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 2.0440436241610738) internal successors, (4873), 2384 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 4873 transitions. [2021-08-21 13:01:15,410 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 4873 transitions. Word has length 83 [2021-08-21 13:01:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:15,410 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 4873 transitions. [2021-08-21 13:01:15,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 4873 transitions. [2021-08-21 13:01:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 13:01:15,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:15,412 INFO L512 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:15,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:15,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 13:01:15,633 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1829757450, now seen corresponding path program 67 times [2021-08-21 13:01:15,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:15,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643909885] [2021-08-21 13:01:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:15,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:18,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:18,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643909885] [2021-08-21 13:01:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643909885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:18,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653613993] [2021-08-21 13:01:18,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:01:18,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:18,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:18,622 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:18,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 13:01:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:20,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-08-21 13:01:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:20,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:01:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:20,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653613993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:20,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:20,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-08-21 13:01:20,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634716522] [2021-08-21 13:01:20,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 13:01:20,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 13:01:20,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 13:01:20,656 INFO L87 Difference]: Start difference. First operand 2385 states and 4873 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:30,232 INFO L93 Difference]: Finished difference Result 4915 states and 9746 transitions. [2021-08-21 13:01:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-21 13:01:30,233 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-21 13:01:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:30,237 INFO L225 Difference]: With dead ends: 4915 [2021-08-21 13:01:30,237 INFO L226 Difference]: Without dead ends: 3205 [2021-08-21 13:01:30,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 10134.9ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-08-21 13:01:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-08-21 13:01:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 206. [2021-08-21 13:01:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.9804878048780488) internal successors, (406), 205 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 406 transitions. [2021-08-21 13:01:30,248 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 406 transitions. Word has length 85 [2021-08-21 13:01:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:30,249 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 406 transitions. [2021-08-21 13:01:30,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 406 transitions. [2021-08-21 13:01:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 13:01:30,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:30,249 INFO L512 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:30,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:30,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 13:01:30,465 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash -864827871, now seen corresponding path program 68 times [2021-08-21 13:01:30,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:30,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59725664] [2021-08-21 13:01:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:30,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:31,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:31,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59725664] [2021-08-21 13:01:31,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59725664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:31,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718069489] [2021-08-21 13:01:31,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:01:31,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:31,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:31,270 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:31,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 13:01:32,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:01:32,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:32,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-21 13:01:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:33,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718069489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:33,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:33,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-08-21 13:01:33,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63042678] [2021-08-21 13:01:33,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 13:01:33,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:33,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 13:01:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:01:33,145 INFO L87 Difference]: Start difference. First operand 206 states and 406 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:33,257 INFO L93 Difference]: Finished difference Result 2899 states and 5669 transitions. [2021-08-21 13:01:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:01:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 13:01:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:33,259 INFO L225 Difference]: With dead ends: 2899 [2021-08-21 13:01:33,259 INFO L226 Difference]: Without dead ends: 2820 [2021-08-21 13:01:33,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 669.6ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:01:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-08-21 13:01:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2021-08-21 13:01:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 2.042166344294004) internal successors, (5279), 2585 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5279 transitions. [2021-08-21 13:01:33,279 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5279 transitions. Word has length 86 [2021-08-21 13:01:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:33,280 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 5279 transitions. [2021-08-21 13:01:33,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5279 transitions. [2021-08-21 13:01:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-21 13:01:33,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:33,282 INFO L512 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:33,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:33,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 13:01:33,497 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1860340670, now seen corresponding path program 69 times [2021-08-21 13:01:33,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:33,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685422952] [2021-08-21 13:01:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:33,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:36,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:36,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685422952] [2021-08-21 13:01:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685422952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:36,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651225946] [2021-08-21 13:01:36,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:36,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:36,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:36,108 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:36,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 13:01:37,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-21 13:01:37,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:37,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 159 conjunts are in the unsatisfiable core [2021-08-21 13:01:37,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:38,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:01:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:38,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651225946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:38,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:38,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2021-08-21 13:01:38,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676719435] [2021-08-21 13:01:38,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-21 13:01:38,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-21 13:01:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 13:01:38,191 INFO L87 Difference]: Start difference. First operand 2586 states and 5279 transitions. Second operand has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:49,274 INFO L93 Difference]: Finished difference Result 5245 states and 10401 transitions. [2021-08-21 13:01:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 13:01:49,274 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-08-21 13:01:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:49,279 INFO L225 Difference]: With dead ends: 5245 [2021-08-21 13:01:49,279 INFO L226 Difference]: Without dead ends: 3369 [2021-08-21 13:01:49,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 11031.9ms TimeCoverageRelationStatistics Valid=3435, Invalid=21687, Unknown=0, NotChecked=0, Total=25122 [2021-08-21 13:01:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-08-21 13:01:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 211. [2021-08-21 13:01:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.980952380952381) internal successors, (416), 210 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 416 transitions. [2021-08-21 13:01:49,290 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 416 transitions. Word has length 87 [2021-08-21 13:01:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:49,290 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 416 transitions. [2021-08-21 13:01:49,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 416 transitions. [2021-08-21 13:01:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-21 13:01:49,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:49,291 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:49,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:49,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:49,513 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:49,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1812907691, now seen corresponding path program 70 times [2021-08-21 13:01:49,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:49,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593351959] [2021-08-21 13:01:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:49,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:50,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:50,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593351959] [2021-08-21 13:01:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593351959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:50,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629431561] [2021-08-21 13:01:50,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:50,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:50,414 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:50,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 13:01:52,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:01:52,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:52,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 13:01:52,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:52,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629431561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:52,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:52,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 42 [2021-08-21 13:01:52,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623331550] [2021-08-21 13:01:52,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 13:01:52,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 13:01:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:01:52,395 INFO L87 Difference]: Start difference. First operand 211 states and 416 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:52,540 INFO L93 Difference]: Finished difference Result 3033 states and 5934 transitions. [2021-08-21 13:01:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:01:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-21 13:01:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:52,543 INFO L225 Difference]: With dead ends: 3033 [2021-08-21 13:01:52,543 INFO L226 Difference]: Without dead ends: 2952 [2021-08-21 13:01:52,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 735.1ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:01:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-08-21 13:01:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2712. [2021-08-21 13:01:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.0413131685724824) internal successors, (5534), 2711 states have internal predecessors, (5534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 5534 transitions. [2021-08-21 13:01:52,565 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 5534 transitions. Word has length 88 [2021-08-21 13:01:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:52,565 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 5534 transitions. [2021-08-21 13:01:52,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 5534 transitions. [2021-08-21 13:01:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-21 13:01:52,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:52,568 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:52,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:52,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:52,781 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -723000522, now seen corresponding path program 71 times [2021-08-21 13:01:52,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:52,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692271092] [2021-08-21 13:01:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:52,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:55,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:55,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692271092] [2021-08-21 13:01:55,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692271092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:55,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992179373] [2021-08-21 13:01:55,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:01:55,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:55,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:55,928 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:55,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 13:01:57,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-21 13:01:57,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:57,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 165 conjunts are in the unsatisfiable core [2021-08-21 13:01:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:58,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:01:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:58,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992179373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:58,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:58,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-08-21 13:01:58,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303826570] [2021-08-21 13:01:58,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-21 13:01:58,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:58,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-21 13:01:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 13:01:58,212 INFO L87 Difference]: Start difference. First operand 2712 states and 5534 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:08,425 INFO L93 Difference]: Finished difference Result 5499 states and 10907 transitions. [2021-08-21 13:02:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 13:02:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-08-21 13:02:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:08,430 INFO L225 Difference]: With dead ends: 5499 [2021-08-21 13:02:08,430 INFO L226 Difference]: Without dead ends: 3535 [2021-08-21 13:02:08,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 10911.5ms TimeCoverageRelationStatistics Valid=3603, Invalid=22803, Unknown=0, NotChecked=0, Total=26406 [2021-08-21 13:02:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2021-08-21 13:02:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 216. [2021-08-21 13:02:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.9813953488372094) internal successors, (426), 215 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2021-08-21 13:02:08,443 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 89 [2021-08-21 13:02:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:08,443 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2021-08-21 13:02:08,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2021-08-21 13:02:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 13:02:08,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:08,443 INFO L512 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:08,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:08,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:08,653 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash -915101471, now seen corresponding path program 72 times [2021-08-21 13:02:08,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:08,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869825615] [2021-08-21 13:02:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:08,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:09,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:09,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869825615] [2021-08-21 13:02:09,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869825615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:09,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628604453] [2021-08-21 13:02:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:02:09,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:09,586 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) [2021-08-21 13:02:09,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 13:02:11,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-08-21 13:02:11,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:11,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-21 13:02:11,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628604453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:11,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:11,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2021-08-21 13:02:11,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370942999] [2021-08-21 13:02:11,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 13:02:11,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 13:02:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:02:11,637 INFO L87 Difference]: Start difference. First operand 216 states and 426 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:11,786 INFO L93 Difference]: Finished difference Result 3170 states and 6205 transitions. [2021-08-21 13:02:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:02:11,787 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-21 13:02:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:11,790 INFO L225 Difference]: With dead ends: 3170 [2021-08-21 13:02:11,790 INFO L226 Difference]: Without dead ends: 3087 [2021-08-21 13:02:11,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 791.8ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:02:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-08-21 13:02:11,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2841. [2021-08-21 13:02:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.040492957746479) internal successors, (5795), 2840 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 5795 transitions. [2021-08-21 13:02:11,813 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 5795 transitions. Word has length 90 [2021-08-21 13:02:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 2841 states and 5795 transitions. [2021-08-21 13:02:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 5795 transitions. [2021-08-21 13:02:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-21 13:02:11,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:11,815 INFO L512 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:11,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:12,016 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 [2021-08-21 13:02:12,016 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:12,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1486332286, now seen corresponding path program 73 times [2021-08-21 13:02:12,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:12,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175290212] [2021-08-21 13:02:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:12,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:15,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:15,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175290212] [2021-08-21 13:02:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175290212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:15,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926451299] [2021-08-21 13:02:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:02:15,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:15,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:15,074 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) [2021-08-21 13:02:15,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 13:02:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 167 conjunts are in the unsatisfiable core [2021-08-21 13:02:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:17,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:02:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:17,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926451299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:17,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:17,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-08-21 13:02:17,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090054319] [2021-08-21 13:02:17,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-08-21 13:02:17,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:17,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-08-21 13:02:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 13:02:17,289 INFO L87 Difference]: Start difference. First operand 2841 states and 5795 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:28,757 INFO L93 Difference]: Finished difference Result 5759 states and 11425 transitions. [2021-08-21 13:02:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-21 13:02:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 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 91 [2021-08-21 13:02:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:28,762 INFO L225 Difference]: With dead ends: 5759 [2021-08-21 13:02:28,762 INFO L226 Difference]: Without dead ends: 3705 [2021-08-21 13:02:28,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 11861.8ms TimeCoverageRelationStatistics Valid=3775, Invalid=23947, Unknown=0, NotChecked=0, Total=27722 [2021-08-21 13:02:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-08-21 13:02:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 221. [2021-08-21 13:02:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.981818181818182) internal successors, (436), 220 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2021-08-21 13:02:28,773 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 91 [2021-08-21 13:02:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:28,773 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2021-08-21 13:02:28,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2021-08-21 13:02:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-21 13:02:28,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:28,773 INFO L512 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:28,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:28,980 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 [2021-08-21 13:02:28,981 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1191417621, now seen corresponding path program 74 times [2021-08-21 13:02:28,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:28,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840349378] [2021-08-21 13:02:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:28,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:29,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:29,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840349378] [2021-08-21 13:02:29,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840349378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:29,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67072186] [2021-08-21 13:02:29,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:02:29,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:29,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:29,752 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) [2021-08-21 13:02:29,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 13:02:31,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:02:31,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-21 13:02:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:31,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67072186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:31,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:31,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 44 [2021-08-21 13:02:31,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844987192] [2021-08-21 13:02:31,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 13:02:31,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:31,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 13:02:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:02:31,796 INFO L87 Difference]: Start difference. First operand 221 states and 436 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:31,945 INFO L93 Difference]: Finished difference Result 3310 states and 6482 transitions. [2021-08-21 13:02:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:02:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-08-21 13:02:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:31,949 INFO L225 Difference]: With dead ends: 3310 [2021-08-21 13:02:31,949 INFO L226 Difference]: Without dead ends: 3225 [2021-08-21 13:02:31,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:02:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-08-21 13:02:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973. [2021-08-21 13:02:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 2.0397039030955586) internal successors, (6062), 2972 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 6062 transitions. [2021-08-21 13:02:31,971 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 6062 transitions. Word has length 92 [2021-08-21 13:02:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:31,971 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 6062 transitions. [2021-08-21 13:02:31,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 6062 transitions. [2021-08-21 13:02:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-21 13:02:31,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:31,973 INFO L512 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:31,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:32,176 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 [2021-08-21 13:02:32,177 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1994418294, now seen corresponding path program 75 times [2021-08-21 13:02:32,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:32,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321521820] [2021-08-21 13:02:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:32,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:35,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:35,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321521820] [2021-08-21 13:02:35,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321521820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:35,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115913875] [2021-08-21 13:02:35,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:02:35,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:35,459 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) [2021-08-21 13:02:35,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 13:02:37,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-21 13:02:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:37,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 171 conjunts are in the unsatisfiable core [2021-08-21 13:02:37,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:37,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:02:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:37,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115913875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:37,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:37,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-08-21 13:02:37,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921396525] [2021-08-21 13:02:37,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-21 13:02:37,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-21 13:02:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 13:02:37,708 INFO L87 Difference]: Start difference. First operand 2973 states and 6062 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:48,797 INFO L93 Difference]: Finished difference Result 6025 states and 11955 transitions. [2021-08-21 13:02:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-21 13:02:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-08-21 13:02:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:48,802 INFO L225 Difference]: With dead ends: 6025 [2021-08-21 13:02:48,802 INFO L226 Difference]: Without dead ends: 3879 [2021-08-21 13:02:48,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 11666.3ms TimeCoverageRelationStatistics Valid=3951, Invalid=25119, Unknown=0, NotChecked=0, Total=29070 [2021-08-21 13:02:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-08-21 13:02:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 226. [2021-08-21 13:02:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 225 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 446 transitions. [2021-08-21 13:02:48,817 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 446 transitions. Word has length 93 [2021-08-21 13:02:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:48,817 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 446 transitions. [2021-08-21 13:02:48,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 446 transitions. [2021-08-21 13:02:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-21 13:02:48,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:48,817 INFO L512 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:48,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 13:02:49,023 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 [2021-08-21 13:02:49,024 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1720503201, now seen corresponding path program 76 times [2021-08-21 13:02:49,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:49,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224847797] [2021-08-21 13:02:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:49,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:50,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:50,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224847797] [2021-08-21 13:02:50,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224847797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:50,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003400514] [2021-08-21 13:02:50,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:02:50,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:50,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:50,041 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) [2021-08-21 13:02:50,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 13:02:51,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:02:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-21 13:02:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:52,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003400514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:52,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:52,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 45 [2021-08-21 13:02:52,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069152582] [2021-08-21 13:02:52,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 13:02:52,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 13:02:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:02:52,157 INFO L87 Difference]: Start difference. First operand 226 states and 446 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:52,323 INFO L93 Difference]: Finished difference Result 3453 states and 6765 transitions. [2021-08-21 13:02:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:02:52,323 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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 94 [2021-08-21 13:02:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:52,326 INFO L225 Difference]: With dead ends: 3453 [2021-08-21 13:02:52,326 INFO L226 Difference]: Without dead ends: 3366 [2021-08-21 13:02:52,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 866.3ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:02:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-08-21 13:02:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3108. [2021-08-21 13:02:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.0389443192790475) internal successors, (6335), 3107 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 6335 transitions. [2021-08-21 13:02:52,384 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 6335 transitions. Word has length 94 [2021-08-21 13:02:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:52,385 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 6335 transitions. [2021-08-21 13:02:52,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 6335 transitions. [2021-08-21 13:02:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 13:02:52,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:52,387 INFO L512 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:52,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:52,608 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 [2021-08-21 13:02:52,608 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 310036674, now seen corresponding path program 77 times [2021-08-21 13:02:52,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:52,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851935449] [2021-08-21 13:02:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:52,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:56,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:56,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851935449] [2021-08-21 13:02:56,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851935449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:56,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041560248] [2021-08-21 13:02:56,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:02:56,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:56,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:56,220 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) [2021-08-21 13:02:56,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 13:02:58,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-08-21 13:02:58,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-21 13:02:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:08,225 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 13:03:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 13:03:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 903 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:08,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041560248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:08,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:08,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 174 [2021-08-21 13:03:08,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171274825] [2021-08-21 13:03:08,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2021-08-21 13:03:08,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2021-08-21 13:03:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4002, Invalid=26448, Unknown=0, NotChecked=0, Total=30450 [2021-08-21 13:03:08,235 INFO L87 Difference]: Start difference. First operand 3108 states and 6335 transitions. Second operand has 175 states, 175 states have (on average 1.0571428571428572) internal successors, (185), 174 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:33,922 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-21 13:06:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 837 states. [2021-08-21 13:06:33,945 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 101 [2021-08-21 13:06:33,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:34,123 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 [2021-08-21 13:06:34,123 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:235) ... 49 more [2021-08-21 13:06:34,126 INFO L168 Benchmark]: Toolchain (without parser) took 845212.15 ms. Allocated memory was 197.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 176.6 MB in the beginning and 869.3 MB in the end (delta: -692.8 MB). Peak memory consumption was 857.2 MB. Max. memory is 8.0 GB. [2021-08-21 13:06:34,126 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 197.1 MB. Free memory was 177.7 MB in the beginning and 177.6 MB in the end (delta: 161.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:06:34,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.09 ms. Allocated memory is still 197.1 MB. Free memory was 176.5 MB in the beginning and 175.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:06:34,126 INFO L168 Benchmark]: Boogie Preprocessor took 9.72 ms. Allocated memory is still 197.1 MB. Free memory was 175.1 MB in the beginning and 174.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:06:34,126 INFO L168 Benchmark]: RCFGBuilder took 252.96 ms. Allocated memory is still 197.1 MB. Free memory was 174.1 MB in the beginning and 163.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-21 13:06:34,126 INFO L168 Benchmark]: TraceAbstraction took 844912.92 ms. Allocated memory was 197.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 162.7 MB in the beginning and 869.3 MB in the end (delta: -706.7 MB). Peak memory consumption was 841.5 MB. Max. memory is 8.0 GB. [2021-08-21 13:06:34,127 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 0.10 ms. Allocated memory is still 197.1 MB. Free memory was 177.7 MB in the beginning and 177.6 MB in the end (delta: 161.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.09 ms. Allocated memory is still 197.1 MB. Free memory was 176.5 MB in the beginning and 175.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.72 ms. Allocated memory is still 197.1 MB. Free memory was 175.1 MB in the beginning and 174.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 252.96 ms. Allocated memory is still 197.1 MB. Free memory was 174.1 MB in the beginning and 163.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 844912.92 ms. Allocated memory was 197.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 162.7 MB in the beginning and 869.3 MB in the end (delta: -706.7 MB). Peak memory consumption was 841.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...