/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:10:46,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:10:46,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:10:46,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:10:46,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:10:46,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:10:46,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:10:46,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:10:46,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:10:46,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:10:46,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:10:46,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 20:10:46,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:10:46,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:10:46,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:10:46,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:10:46,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:10:46,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:10:46,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:10:46,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:10:46,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:10:46,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:10:46,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:10:46,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:10:46,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 20:10:46,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 20:10:46,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 20:10:46,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 20:10:46,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 20:10:46,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 20:10:46,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 20:10:46,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 20:10:46,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 20:10:46,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 20:10:46,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 20:10:46,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 20:10:46,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 20:10:46,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 20:10:46,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:10:46,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:10:46,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:10:46,456 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-Delay.epf [2021-08-06 20:10:46,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:10:46,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:10:46,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:10:46,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:10:46,478 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:10:46,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:10:46,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:10:46,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:10:46,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:10:46,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:10:46,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:10:46,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:10:46,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:10:46,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:10:46,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:10:46,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:10:46,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:10:46,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:10:46,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:10:46,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:10:46,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:10:46,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:10:46,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:10:46,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:10:46,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:10:46,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:10:46,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:10:46,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:10:46,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:10:46,481 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:10:46,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:10:46,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:10:46,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:10:46,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:10:46,837 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:10:46,838 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:10:46,838 INFO L432 ainManager$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 [2021-08-06 20:10:46,839 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-08-06 20:10:46,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:10:46,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:10:46,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:10:46,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:10:46,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:10:46,904 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 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,913 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 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:10:46,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:10:46,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:10:46,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:10:46,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:10:46,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:10:46,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:10:46,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:10:46,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/1) ... [2021-08-06 20:10:46,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:10:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:47,059 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) [2021-08-06 20:10:47,136 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 [2021-08-06 20:10:47,181 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:10:47,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:10:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:10:47,182 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:10:47,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:10:47,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:10:47,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:10:47,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:10:47,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:10:47,184 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:10:47,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:10:47,488 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-06 20:10:47,488 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 20:10:47,489 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 20:10:47,490 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:10:47 BoogieIcfgContainer [2021-08-06 20:10:47,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:10:47,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:10:47,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:10:47,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:10:47,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:10:46" (1/2) ... [2021-08-06 20:10:47,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c52c4de and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:10:47, skipping insertion in model container [2021-08-06 20:10:47,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:10:47" (2/2) ... [2021-08-06 20:10:47,496 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-08-06 20:10:47,500 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:10:47,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:10:47,523 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:10:47,524 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:10:47,634 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 20:10:47,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:10:47,729 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 [2021-08-06 20:10:47,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 20:10:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-06 20:10:47,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:47,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:47,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1902423204, now seen corresponding path program 1 times [2021-08-06 20:10:47,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:47,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573840783] [2021-08-06 20:10:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:47,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:48,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:48,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573840783] [2021-08-06 20:10:48,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573840783] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:10:48,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:10:48,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:10:48,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671786249] [2021-08-06 20:10:48,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:10:48,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:48,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:10:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:10:48,121 INFO L87 Difference]: Start difference. First operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-08-06 20:10:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:48,139 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-08-06 20:10:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:10:48,140 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 [2021-08-06 20:10:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:48,148 INFO L225 Difference]: With dead ends: 20 [2021-08-06 20:10:48,148 INFO L226 Difference]: Without dead ends: 12 [2021-08-06 20:10:48,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:10:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-06 20:10:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-06 20:10:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-08-06 20:10:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-08-06 20:10:48,176 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 9 [2021-08-06 20:10:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:48,176 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-08-06 20:10:48,176 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) [2021-08-06 20:10:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-08-06 20:10:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 20:10:48,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:48,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:48,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:10:48,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1131344589, now seen corresponding path program 1 times [2021-08-06 20:10:48,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:48,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236789366] [2021-08-06 20:10:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:48,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:48,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:48,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236789366] [2021-08-06 20:10:48,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236789366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:10:48,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:10:48,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:10:48,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804293141] [2021-08-06 20:10:48,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:10:48,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:10:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:10:48,256 INFO L87 Difference]: Start difference. First operand 12 states and 17 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) [2021-08-06 20:10:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:48,265 INFO L93 Difference]: Finished difference Result 15 states and 21 transitions. [2021-08-06 20:10:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:10:48,266 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 [2021-08-06 20:10:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:48,267 INFO L225 Difference]: With dead ends: 15 [2021-08-06 20:10:48,267 INFO L226 Difference]: Without dead ends: 14 [2021-08-06 20:10:48,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:10:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-06 20:10:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-06 20:10:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2021-08-06 20:10:48,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 10 [2021-08-06 20:10:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:48,274 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-08-06 20:10:48,275 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) [2021-08-06 20:10:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2021-08-06 20:10:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 20:10:48,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:48,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:48,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:10:48,276 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1781814060, now seen corresponding path program 1 times [2021-08-06 20:10:48,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:48,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217989328] [2021-08-06 20:10:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:48,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:48,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:48,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217989328] [2021-08-06 20:10:48,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217989328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:48,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748220234] [2021-08-06 20:10:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:48,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:48,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:48,374 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) [2021-08-06 20:10:48,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:10:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:10:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:48,599 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 [2021-08-06 20:10:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:48,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748220234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:48,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:48,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-06 20:10:48,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736106027] [2021-08-06 20:10:48,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:10:48,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:10:48,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:10:48,646 INFO L87 Difference]: Start difference. First operand 14 states and 20 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) [2021-08-06 20:10:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:48,681 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-08-06 20:10:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:10:48,682 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 [2021-08-06 20:10:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:48,683 INFO L225 Difference]: With dead ends: 19 [2021-08-06 20:10:48,683 INFO L226 Difference]: Without dead ends: 16 [2021-08-06 20:10:48,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:10:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-06 20:10:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-06 20:10:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2021-08-06 20:10:48,686 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 11 [2021-08-06 20:10:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:48,686 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2021-08-06 20:10:48,687 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) [2021-08-06 20:10:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2021-08-06 20:10:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 20:10:48,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:48,687 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:48,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:48,905 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 [2021-08-06 20:10:48,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:48,906 INFO L82 PathProgramCache]: Analyzing trace with hash 621417219, now seen corresponding path program 2 times [2021-08-06 20:10:48,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:48,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834610068] [2021-08-06 20:10:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:48,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:49,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:49,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834610068] [2021-08-06 20:10:49,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834610068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417231275] [2021-08-06 20:10:49,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:10:49,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:49,025 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) [2021-08-06 20:10:49,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:10:49,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:10:49,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:49,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:10:49,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:49,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:49,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:49,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417231275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:49,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:49,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-06 20:10:49,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932841426] [2021-08-06 20:10:49,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:10:49,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:49,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:10:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:10:49,217 INFO L87 Difference]: Start difference. First operand 16 states and 24 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) [2021-08-06 20:10:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:49,232 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2021-08-06 20:10:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:10:49,233 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 [2021-08-06 20:10:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:49,234 INFO L225 Difference]: With dead ends: 37 [2021-08-06 20:10:49,235 INFO L226 Difference]: Without dead ends: 35 [2021-08-06 20:10:49,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:10:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-06 20:10:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-08-06 20:10:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 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) [2021-08-06 20:10:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 41 transitions. [2021-08-06 20:10:49,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 41 transitions. Word has length 12 [2021-08-06 20:10:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:49,246 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 41 transitions. [2021-08-06 20:10:49,248 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) [2021-08-06 20:10:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 41 transitions. [2021-08-06 20:10:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 20:10:49,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:49,251 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:49,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:49,464 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 [2021-08-06 20:10:49,465 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1709486492, now seen corresponding path program 3 times [2021-08-06 20:10:49,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:49,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463142711] [2021-08-06 20:10:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:49,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:49,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:49,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463142711] [2021-08-06 20:10:49,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463142711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:49,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942371499] [2021-08-06 20:10:49,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:10:49,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:49,622 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) [2021-08-06 20:10:49,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:10:49,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:10:49,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 20:10:49,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:49,891 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 [2021-08-06 20:10:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:49,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942371499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:49,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:49,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 20:10:49,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196597782] [2021-08-06 20:10:49,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:10:49,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:10:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:10:49,920 INFO L87 Difference]: Start difference. First operand 25 states and 41 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) [2021-08-06 20:10:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:49,989 INFO L93 Difference]: Finished difference Result 48 states and 70 transitions. [2021-08-06 20:10:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:10:49,989 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 [2021-08-06 20:10:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:49,993 INFO L225 Difference]: With dead ends: 48 [2021-08-06 20:10:49,993 INFO L226 Difference]: Without dead ends: 30 [2021-08-06 20:10:49,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:10:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-06 20:10:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-08-06 20:10:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 32 transitions. [2021-08-06 20:10:49,999 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 32 transitions. Word has length 13 [2021-08-06 20:10:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:50,000 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 32 transitions. [2021-08-06 20:10:50,001 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) [2021-08-06 20:10:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 32 transitions. [2021-08-06 20:10:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 20:10:50,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:50,003 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:50,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:50,204 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 [2021-08-06 20:10:50,204 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1431395469, now seen corresponding path program 4 times [2021-08-06 20:10:50,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:50,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710385335] [2021-08-06 20:10:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:50,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:50,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:50,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710385335] [2021-08-06 20:10:50,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710385335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:50,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079445390] [2021-08-06 20:10:50,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:10:50,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:50,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:50,301 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) [2021-08-06 20:10:50,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:10:50,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:10:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:10:50,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:50,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:50,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:50,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079445390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:50,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:50,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:10:50,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646371964] [2021-08-06 20:10:50,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:10:50,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:10:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:10:50,526 INFO L87 Difference]: Start difference. First operand 20 states and 32 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) [2021-08-06 20:10:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:50,547 INFO L93 Difference]: Finished difference Result 54 states and 81 transitions. [2021-08-06 20:10:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:10:50,549 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 [2021-08-06 20:10:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:50,550 INFO L225 Difference]: With dead ends: 54 [2021-08-06 20:10:50,550 INFO L226 Difference]: Without dead ends: 51 [2021-08-06 20:10:50,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:10:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-06 20:10:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-08-06 20:10:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 64 transitions. [2021-08-06 20:10:50,569 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 64 transitions. Word has length 14 [2021-08-06 20:10:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:50,569 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 64 transitions. [2021-08-06 20:10:50,569 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) [2021-08-06 20:10:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 64 transitions. [2021-08-06 20:10:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 20:10:50,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:50,570 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:50,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:50,792 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 [2021-08-06 20:10:50,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash 543066772, now seen corresponding path program 5 times [2021-08-06 20:10:50,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:50,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508691854] [2021-08-06 20:10:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:50,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:51,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:51,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508691854] [2021-08-06 20:10:51,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508691854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:51,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686952470] [2021-08-06 20:10:51,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:10:51,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:51,020 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) [2021-08-06 20:10:51,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:10:51,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:10:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:51,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 20:10:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:51,607 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:10:51,607 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 [2021-08-06 20:10:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:51,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686952470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:51,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:51,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 20:10:51,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467526871] [2021-08-06 20:10:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:10:51,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:10:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:10:51,643 INFO L87 Difference]: Start difference. First operand 36 states and 64 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) [2021-08-06 20:10:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:52,101 INFO L93 Difference]: Finished difference Result 165 states and 256 transitions. [2021-08-06 20:10:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:10:52,102 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 [2021-08-06 20:10:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:52,103 INFO L225 Difference]: With dead ends: 165 [2021-08-06 20:10:52,103 INFO L226 Difference]: Without dead ends: 93 [2021-08-06 20:10:52,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:10:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-06 20:10:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2021-08-06 20:10:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 80 transitions. [2021-08-06 20:10:52,116 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 80 transitions. Word has length 15 [2021-08-06 20:10:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:52,116 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 80 transitions. [2021-08-06 20:10:52,116 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) [2021-08-06 20:10:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 80 transitions. [2021-08-06 20:10:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 20:10:52,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:52,121 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:52,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:52,322 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 [2021-08-06 20:10:52,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1239052252, now seen corresponding path program 6 times [2021-08-06 20:10:52,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:52,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129236455] [2021-08-06 20:10:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:52,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:52,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:52,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129236455] [2021-08-06 20:10:52,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129236455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:52,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077499217] [2021-08-06 20:10:52,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:10:52,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:52,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:52,511 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) [2021-08-06 20:10:52,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:10:52,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:10:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:10:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:52,821 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 [2021-08-06 20:10:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077499217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:52,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:52,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-06 20:10:52,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112464844] [2021-08-06 20:10:52,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:10:52,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:10:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:10:52,850 INFO L87 Difference]: Start difference. First operand 43 states and 80 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) [2021-08-06 20:10:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:53,043 INFO L93 Difference]: Finished difference Result 89 states and 145 transitions. [2021-08-06 20:10:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:10:53,043 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 [2021-08-06 20:10:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:53,045 INFO L225 Difference]: With dead ends: 89 [2021-08-06 20:10:53,045 INFO L226 Difference]: Without dead ends: 59 [2021-08-06 20:10:53,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:10:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-06 20:10:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 28. [2021-08-06 20:10:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 48 transitions. [2021-08-06 20:10:53,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 48 transitions. Word has length 17 [2021-08-06 20:10:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:53,055 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 48 transitions. [2021-08-06 20:10:53,055 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) [2021-08-06 20:10:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 48 transitions. [2021-08-06 20:10:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:10:53,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:53,055 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:53,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:53,256 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 [2021-08-06 20:10:53,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 267164083, now seen corresponding path program 7 times [2021-08-06 20:10:53,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:53,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558904787] [2021-08-06 20:10:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:53,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:53,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:53,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558904787] [2021-08-06 20:10:53,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558904787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:53,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256712122] [2021-08-06 20:10:53,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:10:53,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:53,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:53,371 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) [2021-08-06 20:10:53,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:10:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:10:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:53,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:53,578 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:53,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256712122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:53,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:53,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 20:10:53,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278128351] [2021-08-06 20:10:53,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:10:53,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:53,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:10:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:10:53,606 INFO L87 Difference]: Start difference. First operand 28 states and 48 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) [2021-08-06 20:10:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:53,622 INFO L93 Difference]: Finished difference Result 94 states and 151 transitions. [2021-08-06 20:10:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:10:53,623 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 [2021-08-06 20:10:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:53,623 INFO L225 Difference]: With dead ends: 94 [2021-08-06 20:10:53,623 INFO L226 Difference]: Without dead ends: 89 [2021-08-06 20:10:53,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:10:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-06 20:10:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2021-08-06 20:10:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 122 transitions. [2021-08-06 20:10:53,639 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 122 transitions. Word has length 18 [2021-08-06 20:10:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:53,639 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 122 transitions. [2021-08-06 20:10:53,639 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) [2021-08-06 20:10:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 122 transitions. [2021-08-06 20:10:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:10:53,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:53,640 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:53,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:53,846 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 [2021-08-06 20:10:53,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:53,847 INFO L82 PathProgramCache]: Analyzing trace with hash -819853228, now seen corresponding path program 8 times [2021-08-06 20:10:53,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:53,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551108689] [2021-08-06 20:10:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:53,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:54,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:54,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551108689] [2021-08-06 20:10:54,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551108689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:54,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898573718] [2021-08-06 20:10:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:10:54,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:54,077 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) [2021-08-06 20:10:54,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:10:54,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:10:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:54,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:10:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:54,336 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 [2021-08-06 20:10:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:54,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898573718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:54,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:54,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-06 20:10:54,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699164285] [2021-08-06 20:10:54,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:10:54,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:10:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:10:54,373 INFO L87 Difference]: Start difference. First operand 64 states and 122 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) [2021-08-06 20:10:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:54,604 INFO L93 Difference]: Finished difference Result 129 states and 214 transitions. [2021-08-06 20:10:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:10:54,609 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 [2021-08-06 20:10:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:54,610 INFO L225 Difference]: With dead ends: 129 [2021-08-06 20:10:54,610 INFO L226 Difference]: Without dead ends: 81 [2021-08-06 20:10:54,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:10:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-06 20:10:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 32. [2021-08-06 20:10:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 56 transitions. [2021-08-06 20:10:54,617 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 56 transitions. Word has length 19 [2021-08-06 20:10:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:54,618 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 56 transitions. [2021-08-06 20:10:54,618 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) [2021-08-06 20:10:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 56 transitions. [2021-08-06 20:10:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:10:54,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:54,618 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:54,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:54,819 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 [2021-08-06 20:10:54,819 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash 377431939, now seen corresponding path program 9 times [2021-08-06 20:10:54,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:54,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464651589] [2021-08-06 20:10:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:54,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:54,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:54,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464651589] [2021-08-06 20:10:54,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464651589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:54,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243618990] [2021-08-06 20:10:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:10:54,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:54,935 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) [2021-08-06 20:10:54,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:10:55,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:10:55,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 20:10:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:55,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:55,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:55,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243618990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:55,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:55,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 20:10:55,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748247493] [2021-08-06 20:10:55,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:10:55,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:55,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:10:55,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:10:55,368 INFO L87 Difference]: Start difference. First operand 32 states and 56 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) [2021-08-06 20:10:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:55,386 INFO L93 Difference]: Finished difference Result 117 states and 192 transitions. [2021-08-06 20:10:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:10:55,386 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 [2021-08-06 20:10:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:55,387 INFO L225 Difference]: With dead ends: 117 [2021-08-06 20:10:55,387 INFO L226 Difference]: Without dead ends: 111 [2021-08-06 20:10:55,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:10:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-06 20:10:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2021-08-06 20:10:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 157 transitions. [2021-08-06 20:10:55,392 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 157 transitions. Word has length 20 [2021-08-06 20:10:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:55,392 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 157 transitions. [2021-08-06 20:10:55,392 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) [2021-08-06 20:10:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 157 transitions. [2021-08-06 20:10:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 20:10:55,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:55,393 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:55,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:55,616 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 [2021-08-06 20:10:55,617 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash -569151004, now seen corresponding path program 10 times [2021-08-06 20:10:55,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:55,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751390296] [2021-08-06 20:10:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:55,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:56,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:56,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751390296] [2021-08-06 20:10:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751390296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:56,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531511746] [2021-08-06 20:10:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:10:56,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:56,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:56,084 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) [2021-08-06 20:10:56,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:10:56,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:10:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:10:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:56,399 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 [2021-08-06 20:10:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:56,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531511746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:56,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:56,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-06 20:10:56,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336605372] [2021-08-06 20:10:56,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:10:56,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:10:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:10:56,425 INFO L87 Difference]: Start difference. First operand 81 states and 157 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) [2021-08-06 20:10:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:56,777 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2021-08-06 20:10:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:10:56,777 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 [2021-08-06 20:10:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:56,778 INFO L225 Difference]: With dead ends: 164 [2021-08-06 20:10:56,778 INFO L226 Difference]: Without dead ends: 104 [2021-08-06 20:10:56,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:10:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-06 20:10:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 36. [2021-08-06 20:10:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 64 transitions. [2021-08-06 20:10:56,781 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 64 transitions. Word has length 21 [2021-08-06 20:10:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:56,781 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 64 transitions. [2021-08-06 20:10:56,782 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) [2021-08-06 20:10:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 64 transitions. [2021-08-06 20:10:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:10:56,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:56,782 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:56,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:56,997 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 [2021-08-06 20:10:56,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -440733709, now seen corresponding path program 11 times [2021-08-06 20:10:56,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:56,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473373861] [2021-08-06 20:10:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:56,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:57,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:57,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473373861] [2021-08-06 20:10:57,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473373861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:57,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058634601] [2021-08-06 20:10:57,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:10:57,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:57,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:57,305 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) [2021-08-06 20:10:57,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:10:57,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:10:57,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:10:57,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:57,591 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:57,592 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:10:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:57,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058634601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:57,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:57,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 20:10:57,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742921698] [2021-08-06 20:10:57,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:10:57,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:10:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:10:57,616 INFO L87 Difference]: Start difference. First operand 36 states and 64 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) [2021-08-06 20:10:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:57,638 INFO L93 Difference]: Finished difference Result 142 states and 237 transitions. [2021-08-06 20:10:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:10:57,638 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 [2021-08-06 20:10:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:57,639 INFO L225 Difference]: With dead ends: 142 [2021-08-06 20:10:57,640 INFO L226 Difference]: Without dead ends: 135 [2021-08-06 20:10:57,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:10:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-06 20:10:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2021-08-06 20:10:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.97979797979798) internal successors, (196), 99 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 196 transitions. [2021-08-06 20:10:57,654 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 196 transitions. Word has length 22 [2021-08-06 20:10:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:57,655 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 196 transitions. [2021-08-06 20:10:57,655 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) [2021-08-06 20:10:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 196 transitions. [2021-08-06 20:10:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:10:57,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:57,656 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:57,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:57,876 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 [2021-08-06 20:10:57,877 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:10:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:57,877 INFO L82 PathProgramCache]: Analyzing trace with hash 426124820, now seen corresponding path program 12 times [2021-08-06 20:10:57,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:57,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368717105] [2021-08-06 20:10:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:57,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:58,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:58,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368717105] [2021-08-06 20:10:58,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368717105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:58,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471219402] [2021-08-06 20:10:58,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:10:58,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:58,449 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) [2021-08-06 20:10:58,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:10:58,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:10:58,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:10:58,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:59,517 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:10:59,518 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 [2021-08-06 20:10:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:59,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471219402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:59,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:59,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:10:59,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156693769] [2021-08-06 20:10:59,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:10:59,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:10:59,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:10:59,546 INFO L87 Difference]: Start difference. First operand 100 states and 196 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) [2021-08-06 20:11:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:01,530 INFO L93 Difference]: Finished difference Result 611 states and 1030 transitions. [2021-08-06 20:11:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 20:11:01,531 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 [2021-08-06 20:11:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:01,533 INFO L225 Difference]: With dead ends: 611 [2021-08-06 20:11:01,533 INFO L226 Difference]: Without dead ends: 363 [2021-08-06 20:11:01,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2426.9ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:11:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-06 20:11:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 111. [2021-08-06 20:11:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0) internal successors, (220), 110 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 220 transitions. [2021-08-06 20:11:01,541 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 220 transitions. Word has length 23 [2021-08-06 20:11:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:01,542 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 220 transitions. [2021-08-06 20:11:01,542 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) [2021-08-06 20:11:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 220 transitions. [2021-08-06 20:11:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:11:01,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:01,543 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:01,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:01,743 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 [2021-08-06 20:11:01,744 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash 175436708, now seen corresponding path program 13 times [2021-08-06 20:11:01,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:01,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612515284] [2021-08-06 20:11:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:01,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:02,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:02,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612515284] [2021-08-06 20:11:02,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612515284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:02,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987394529] [2021-08-06 20:11:02,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:02,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:02,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:02,225 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) [2021-08-06 20:11:02,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:11:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:11:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:02,675 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 [2021-08-06 20:11:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:02,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987394529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:02,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:02,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-06 20:11:02,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70802178] [2021-08-06 20:11:02,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:11:02,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:02,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:11:02,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:11:02,699 INFO L87 Difference]: Start difference. First operand 111 states and 220 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) [2021-08-06 20:11:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:03,214 INFO L93 Difference]: Finished difference Result 233 states and 409 transitions. [2021-08-06 20:11:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:11:03,215 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 [2021-08-06 20:11:03,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:03,217 INFO L225 Difference]: With dead ends: 233 [2021-08-06 20:11:03,217 INFO L226 Difference]: Without dead ends: 157 [2021-08-06 20:11:03,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 586.1ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:11:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-06 20:11:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 44. [2021-08-06 20:11:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 80 transitions. [2021-08-06 20:11:03,225 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 80 transitions. Word has length 25 [2021-08-06 20:11:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:03,225 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 80 transitions. [2021-08-06 20:11:03,225 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) [2021-08-06 20:11:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 80 transitions. [2021-08-06 20:11:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:11:03,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:03,228 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:03,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:03,448 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 [2021-08-06 20:11:03,449 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1166648883, now seen corresponding path program 14 times [2021-08-06 20:11:03,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:03,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127247031] [2021-08-06 20:11:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:03,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:03,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:03,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127247031] [2021-08-06 20:11:03,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127247031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:03,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020544599] [2021-08-06 20:11:03,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:11:03,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:03,644 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) [2021-08-06 20:11:03,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:11:03,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:11:03,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:03,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:11:03,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:04,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:04,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:04,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020544599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:04,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:04,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 20:11:04,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247694016] [2021-08-06 20:11:04,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:11:04,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:11:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:11:04,045 INFO L87 Difference]: Start difference. First operand 44 states and 80 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) [2021-08-06 20:11:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:04,093 INFO L93 Difference]: Finished difference Result 198 states and 339 transitions. [2021-08-06 20:11:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:11:04,094 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 [2021-08-06 20:11:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:04,094 INFO L225 Difference]: With dead ends: 198 [2021-08-06 20:11:04,094 INFO L226 Difference]: Without dead ends: 189 [2021-08-06 20:11:04,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:11:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-06 20:11:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-08-06 20:11:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.0) internal successors, (286), 143 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) [2021-08-06 20:11:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 286 transitions. [2021-08-06 20:11:04,110 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 286 transitions. Word has length 26 [2021-08-06 20:11:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:04,110 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 286 transitions. [2021-08-06 20:11:04,110 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) [2021-08-06 20:11:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 286 transitions. [2021-08-06 20:11:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:11:04,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:04,111 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:04,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:04,338 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 [2021-08-06 20:11:04,338 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:04,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1501895724, now seen corresponding path program 15 times [2021-08-06 20:11:04,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:04,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642033394] [2021-08-06 20:11:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:04,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:04,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:04,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642033394] [2021-08-06 20:11:04,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642033394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:04,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578432479] [2021-08-06 20:11:04,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:11:04,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:04,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:04,734 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) [2021-08-06 20:11:04,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:11:04,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:11:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 20:11:04,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:05,212 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 [2021-08-06 20:11:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:05,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578432479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:05,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:05,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-08-06 20:11:05,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526723014] [2021-08-06 20:11:05,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:11:05,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:11:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:11:05,243 INFO L87 Difference]: Start difference. First operand 144 states and 286 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) [2021-08-06 20:11:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:05,927 INFO L93 Difference]: Finished difference Result 293 states and 518 transitions. [2021-08-06 20:11:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:11:05,930 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 [2021-08-06 20:11:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:05,931 INFO L225 Difference]: With dead ends: 293 [2021-08-06 20:11:05,931 INFO L226 Difference]: Without dead ends: 191 [2021-08-06 20:11:05,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:11:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-06 20:11:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 48. [2021-08-06 20:11:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 88 transitions. [2021-08-06 20:11:05,935 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 88 transitions. Word has length 27 [2021-08-06 20:11:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:05,935 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 88 transitions. [2021-08-06 20:11:05,935 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) [2021-08-06 20:11:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 88 transitions. [2021-08-06 20:11:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:11:05,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:05,935 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:05,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:06,141 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 [2021-08-06 20:11:06,141 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 708951043, now seen corresponding path program 16 times [2021-08-06 20:11:06,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:06,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606433827] [2021-08-06 20:11:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:06,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:06,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:06,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606433827] [2021-08-06 20:11:06,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606433827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:06,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231741885] [2021-08-06 20:11:06,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:11:06,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:06,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:06,333 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) [2021-08-06 20:11:06,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:11:06,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:11:06,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:11:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:06,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:06,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:06,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231741885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:06,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:06,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 20:11:06,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427278729] [2021-08-06 20:11:06,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:11:06,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:11:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:11:06,821 INFO L87 Difference]: Start difference. First operand 48 states and 88 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) [2021-08-06 20:11:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:06,858 INFO L93 Difference]: Finished difference Result 229 states and 396 transitions. [2021-08-06 20:11:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:11:06,858 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 [2021-08-06 20:11:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:06,859 INFO L225 Difference]: With dead ends: 229 [2021-08-06 20:11:06,859 INFO L226 Difference]: Without dead ends: 219 [2021-08-06 20:11:06,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:11:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-06 20:11:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 169. [2021-08-06 20:11:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.005952380952381) internal successors, (337), 168 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 337 transitions. [2021-08-06 20:11:06,879 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 337 transitions. Word has length 28 [2021-08-06 20:11:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:06,880 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 337 transitions. [2021-08-06 20:11:06,880 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) [2021-08-06 20:11:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 337 transitions. [2021-08-06 20:11:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:11:06,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:06,888 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:06,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:07,089 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 [2021-08-06 20:11:07,089 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:07,090 INFO L82 PathProgramCache]: Analyzing trace with hash 333059428, now seen corresponding path program 17 times [2021-08-06 20:11:07,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:07,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833332983] [2021-08-06 20:11:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:07,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:07,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:07,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833332983] [2021-08-06 20:11:07,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833332983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:07,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139486769] [2021-08-06 20:11:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:07,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:07,542 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) [2021-08-06 20:11:07,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:11:07,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:11:07,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:07,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:11:07,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:08,004 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 [2021-08-06 20:11:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:08,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139486769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:08,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:08,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-06 20:11:08,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228302669] [2021-08-06 20:11:08,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:11:08,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:11:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:11:08,032 INFO L87 Difference]: Start difference. First operand 169 states and 337 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) [2021-08-06 20:11:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:08,726 INFO L93 Difference]: Finished difference Result 344 states and 614 transitions. [2021-08-06 20:11:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:11:08,727 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 [2021-08-06 20:11:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:08,728 INFO L225 Difference]: With dead ends: 344 [2021-08-06 20:11:08,728 INFO L226 Difference]: Without dead ends: 226 [2021-08-06 20:11:08,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:11:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-06 20:11:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 52. [2021-08-06 20:11:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 51 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 96 transitions. [2021-08-06 20:11:08,732 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 96 transitions. Word has length 29 [2021-08-06 20:11:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:08,732 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 96 transitions. [2021-08-06 20:11:08,732 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) [2021-08-06 20:11:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 96 transitions. [2021-08-06 20:11:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:11:08,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:08,733 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:08,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:08,948 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 [2021-08-06 20:11:08,949 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1757985907, now seen corresponding path program 18 times [2021-08-06 20:11:08,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:08,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989466922] [2021-08-06 20:11:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:08,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:09,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:09,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989466922] [2021-08-06 20:11:09,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989466922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:09,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629629488] [2021-08-06 20:11:09,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:11:09,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:09,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:09,205 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) [2021-08-06 20:11:09,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:11:09,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 20:11:09,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:11:09,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:09,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:09,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:09,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629629488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:09,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:09,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 20:11:09,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741554043] [2021-08-06 20:11:09,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:11:09,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:09,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:11:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:11:09,585 INFO L87 Difference]: Start difference. First operand 52 states and 96 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) [2021-08-06 20:11:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:09,614 INFO L93 Difference]: Finished difference Result 262 states and 457 transitions. [2021-08-06 20:11:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:11:09,625 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 [2021-08-06 20:11:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:09,626 INFO L225 Difference]: With dead ends: 262 [2021-08-06 20:11:09,626 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 20:11:09,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:11:09,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 20:11:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-08-06 20:11:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.01025641025641) internal successors, (392), 195 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 392 transitions. [2021-08-06 20:11:09,631 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 392 transitions. Word has length 30 [2021-08-06 20:11:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:09,631 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 392 transitions. [2021-08-06 20:11:09,632 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) [2021-08-06 20:11:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 392 transitions. [2021-08-06 20:11:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:11:09,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:09,632 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:09,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:09,852 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 [2021-08-06 20:11:09,853 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1303396756, now seen corresponding path program 19 times [2021-08-06 20:11:09,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:09,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350343513] [2021-08-06 20:11:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:09,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:10,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:10,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350343513] [2021-08-06 20:11:10,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350343513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:10,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118448267] [2021-08-06 20:11:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:10,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:10,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:10,284 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) [2021-08-06 20:11:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:11:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 20:11:10,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:10,730 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 [2021-08-06 20:11:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:10,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118448267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:10,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:10,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-06 20:11:10,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102239286] [2021-08-06 20:11:10,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:11:10,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:10,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:11:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:11:10,755 INFO L87 Difference]: Start difference. First operand 196 states and 392 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) [2021-08-06 20:11:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:11,541 INFO L93 Difference]: Finished difference Result 399 states and 718 transitions. [2021-08-06 20:11:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:11:11,542 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 [2021-08-06 20:11:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:11,543 INFO L225 Difference]: With dead ends: 399 [2021-08-06 20:11:11,543 INFO L226 Difference]: Without dead ends: 264 [2021-08-06 20:11:11,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:11:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-06 20:11:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 56. [2021-08-06 20:11:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 55 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 104 transitions. [2021-08-06 20:11:11,546 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 104 transitions. Word has length 31 [2021-08-06 20:11:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:11,546 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 104 transitions. [2021-08-06 20:11:11,546 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) [2021-08-06 20:11:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 104 transitions. [2021-08-06 20:11:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:11:11,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:11,546 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:11,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:11,747 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 [2021-08-06 20:11:11,747 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:11,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1773672003, now seen corresponding path program 20 times [2021-08-06 20:11:11,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:11,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740274975] [2021-08-06 20:11:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:11,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:11,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:11,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740274975] [2021-08-06 20:11:11,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740274975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:11,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435414543] [2021-08-06 20:11:11,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:11:11,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:11,931 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) [2021-08-06 20:11:11,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:11:12,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:11:12,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:12,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:11:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:12,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:12,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:12,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435414543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:12,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:12,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 20:11:12,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137774667] [2021-08-06 20:11:12,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:11:12,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:11:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:11:12,353 INFO L87 Difference]: Start difference. First operand 56 states and 104 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) [2021-08-06 20:11:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:12,389 INFO L93 Difference]: Finished difference Result 297 states and 522 transitions. [2021-08-06 20:11:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:11:12,392 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 [2021-08-06 20:11:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:12,393 INFO L225 Difference]: With dead ends: 297 [2021-08-06 20:11:12,394 INFO L226 Difference]: Without dead ends: 285 [2021-08-06 20:11:12,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:11:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-06 20:11:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 225. [2021-08-06 20:11:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.013392857142857) internal successors, (451), 224 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 451 transitions. [2021-08-06 20:11:12,399 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 451 transitions. Word has length 32 [2021-08-06 20:11:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:12,399 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 451 transitions. [2021-08-06 20:11:12,399 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) [2021-08-06 20:11:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 451 transitions. [2021-08-06 20:11:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:11:12,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:12,400 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:12,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 20:11:12,608 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 [2021-08-06 20:11:12,608 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:12,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1294805212, now seen corresponding path program 21 times [2021-08-06 20:11:12,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:12,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935477896] [2021-08-06 20:11:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:12,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:13,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:13,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935477896] [2021-08-06 20:11:13,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935477896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:13,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414797767] [2021-08-06 20:11:13,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:11:13,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:13,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:13,028 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) [2021-08-06 20:11:13,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:11:13,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 20:11:13,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:13,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:11:13,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:14,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 92.7 percent of original size [2021-08-06 20:11:14,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 92.7 percent of original size [2021-08-06 20:11:14,610 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 20:11:14,610 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 [2021-08-06 20:11:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:14,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414797767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:14,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:14,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 47 [2021-08-06 20:11:14,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967409734] [2021-08-06 20:11:14,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 20:11:14,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 20:11:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2105, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:11:14,636 INFO L87 Difference]: Start difference. First operand 225 states and 451 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) [2021-08-06 20:11:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:16,370 INFO L93 Difference]: Finished difference Result 878 states and 1659 transitions. [2021-08-06 20:11:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:11:16,370 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 [2021-08-06 20:11:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:16,373 INFO L225 Difference]: With dead ends: 878 [2021-08-06 20:11:16,373 INFO L226 Difference]: Without dead ends: 505 [2021-08-06 20:11:16,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 2107.7ms TimeCoverageRelationStatistics Valid=701, Invalid=5941, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 20:11:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-06 20:11:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 62. [2021-08-06 20:11:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.901639344262295) internal successors, (116), 61 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) [2021-08-06 20:11:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 116 transitions. [2021-08-06 20:11:16,379 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 116 transitions. Word has length 33 [2021-08-06 20:11:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:16,379 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 116 transitions. [2021-08-06 20:11:16,379 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) [2021-08-06 20:11:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 116 transitions. [2021-08-06 20:11:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:11:16,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:16,380 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:16,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:16,605 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 [2021-08-06 20:11:16,605 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:16,605 INFO L82 PathProgramCache]: Analyzing trace with hash 374751060, now seen corresponding path program 22 times [2021-08-06 20:11:16,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:16,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788220805] [2021-08-06 20:11:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:16,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:17,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:17,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788220805] [2021-08-06 20:11:17,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788220805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:17,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956886795] [2021-08-06 20:11:17,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:11:17,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:17,169 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) [2021-08-06 20:11:17,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:11:17,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:11:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-06 20:11:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:17,765 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 [2021-08-06 20:11:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:17,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956886795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:17,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:17,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-08-06 20:11:17,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935201597] [2021-08-06 20:11:17,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:11:17,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:11:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:11:17,794 INFO L87 Difference]: Start difference. First operand 62 states and 116 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) [2021-08-06 20:11:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:18,821 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-08-06 20:11:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:11:18,822 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 [2021-08-06 20:11:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:18,822 INFO L225 Difference]: With dead ends: 67 [2021-08-06 20:11:18,822 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 20:11:18,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1178.6ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:11:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 20:11:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-06 20:11:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9047619047619047) internal successors, (120), 63 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 120 transitions. [2021-08-06 20:11:18,825 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 120 transitions. Word has length 35 [2021-08-06 20:11:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:18,825 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 120 transitions. [2021-08-06 20:11:18,825 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) [2021-08-06 20:11:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 120 transitions. [2021-08-06 20:11:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:11:18,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:18,825 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:18,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 20:11:19,026 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 [2021-08-06 20:11:19,026 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:19,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1244540797, now seen corresponding path program 23 times [2021-08-06 20:11:19,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:19,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410098671] [2021-08-06 20:11:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:19,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:19,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:19,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410098671] [2021-08-06 20:11:19,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410098671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:19,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829061353] [2021-08-06 20:11:19,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:19,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:19,229 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) [2021-08-06 20:11:19,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:11:19,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:11:19,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:11:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:19,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:19,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:19,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829061353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:19,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:19,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 20:11:19,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111825858] [2021-08-06 20:11:19,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:11:19,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:11:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:11:19,734 INFO L87 Difference]: Start difference. First operand 64 states and 120 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) [2021-08-06 20:11:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:19,770 INFO L93 Difference]: Finished difference Result 373 states and 664 transitions. [2021-08-06 20:11:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:11:19,777 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 [2021-08-06 20:11:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:19,779 INFO L225 Difference]: With dead ends: 373 [2021-08-06 20:11:19,779 INFO L226 Difference]: Without dead ends: 359 [2021-08-06 20:11:19,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:11:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-06 20:11:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 289. [2021-08-06 20:11:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.017361111111111) internal successors, (581), 288 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 581 transitions. [2021-08-06 20:11:19,786 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 581 transitions. Word has length 36 [2021-08-06 20:11:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:19,786 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 581 transitions. [2021-08-06 20:11:19,786 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) [2021-08-06 20:11:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 581 transitions. [2021-08-06 20:11:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:11:19,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:19,787 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:19,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:20,010 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 [2021-08-06 20:11:20,010 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2146384100, now seen corresponding path program 24 times [2021-08-06 20:11:20,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:20,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140758660] [2021-08-06 20:11:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:20,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:20,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:20,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140758660] [2021-08-06 20:11:20,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140758660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:20,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786108207] [2021-08-06 20:11:20,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:11:20,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:20,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:20,558 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) [2021-08-06 20:11:20,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:11:20,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:11:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 20:11:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:21,185 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 [2021-08-06 20:11:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:21,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786108207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:21,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:21,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-08-06 20:11:21,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771285307] [2021-08-06 20:11:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:11:21,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:11:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:11:21,211 INFO L87 Difference]: Start difference. First operand 289 states and 581 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) [2021-08-06 20:11:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:22,620 INFO L93 Difference]: Finished difference Result 588 states and 1078 transitions. [2021-08-06 20:11:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:11:22,621 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 [2021-08-06 20:11:22,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:22,623 INFO L225 Difference]: With dead ends: 588 [2021-08-06 20:11:22,623 INFO L226 Difference]: Without dead ends: 396 [2021-08-06 20:11:22,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1457.6ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:11:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-06 20:11:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 68. [2021-08-06 20:11:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9104477611940298) internal successors, (128), 67 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 128 transitions. [2021-08-06 20:11:22,628 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 128 transitions. Word has length 37 [2021-08-06 20:11:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:22,628 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 128 transitions. [2021-08-06 20:11:22,628 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) [2021-08-06 20:11:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 128 transitions. [2021-08-06 20:11:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 20:11:22,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:22,629 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:22,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:22,844 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 [2021-08-06 20:11:22,845 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2136475891, now seen corresponding path program 25 times [2021-08-06 20:11:22,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:22,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457944580] [2021-08-06 20:11:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:22,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:23,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:23,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457944580] [2021-08-06 20:11:23,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457944580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:23,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512051673] [2021-08-06 20:11:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:23,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:23,069 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) [2021-08-06 20:11:23,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:11:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:11:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:23,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:23,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:23,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512051673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:23,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:23,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 20:11:23,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262105203] [2021-08-06 20:11:23,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:11:23,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:11:23,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:11:23,635 INFO L87 Difference]: Start difference. First operand 68 states and 128 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) [2021-08-06 20:11:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:23,700 INFO L93 Difference]: Finished difference Result 414 states and 741 transitions. [2021-08-06 20:11:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:11:23,701 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 [2021-08-06 20:11:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:23,710 INFO L225 Difference]: With dead ends: 414 [2021-08-06 20:11:23,710 INFO L226 Difference]: Without dead ends: 399 [2021-08-06 20:11:23,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:11:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-06 20:11:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-08-06 20:11:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.018575851393189) internal successors, (652), 323 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 652 transitions. [2021-08-06 20:11:23,717 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 652 transitions. Word has length 38 [2021-08-06 20:11:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:23,717 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 652 transitions. [2021-08-06 20:11:23,717 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) [2021-08-06 20:11:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 652 transitions. [2021-08-06 20:11:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:23,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:23,718 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:23,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:23,933 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 [2021-08-06 20:11:23,933 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 935124244, now seen corresponding path program 26 times [2021-08-06 20:11:23,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:23,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381681790] [2021-08-06 20:11:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:23,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:24,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:24,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381681790] [2021-08-06 20:11:24,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381681790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:24,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785656659] [2021-08-06 20:11:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:11:24,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:24,654 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) [2021-08-06 20:11:24,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:11:25,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:11:25,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-06 20:11:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:25,306 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 [2021-08-06 20:11:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:25,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785656659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:25,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:25,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-08-06 20:11:25,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858822395] [2021-08-06 20:11:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:11:25,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:11:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:11:25,337 INFO L87 Difference]: Start difference. First operand 324 states and 652 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) [2021-08-06 20:11:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:26,752 INFO L93 Difference]: Finished difference Result 659 states and 1214 transitions. [2021-08-06 20:11:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:11:26,752 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 [2021-08-06 20:11:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:26,754 INFO L225 Difference]: With dead ends: 659 [2021-08-06 20:11:26,754 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 20:11:26,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1597.9ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:11:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 20:11:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 72. [2021-08-06 20:11:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9154929577464788) internal successors, (136), 71 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) [2021-08-06 20:11:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 136 transitions. [2021-08-06 20:11:26,759 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 136 transitions. Word has length 39 [2021-08-06 20:11:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:26,759 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 136 transitions. [2021-08-06 20:11:26,759 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) [2021-08-06 20:11:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 136 transitions. [2021-08-06 20:11:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 20:11:26,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:26,760 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:26,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:26,984 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 [2021-08-06 20:11:26,984 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1052841277, now seen corresponding path program 27 times [2021-08-06 20:11:26,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:26,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994730707] [2021-08-06 20:11:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:26,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:27,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:27,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994730707] [2021-08-06 20:11:27,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994730707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:27,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835551895] [2021-08-06 20:11:27,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:11:27,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:27,224 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) [2021-08-06 20:11:27,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:11:27,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 20:11:27,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:11:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:27,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:27,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:27,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835551895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:27,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:27,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-08-06 20:11:27,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123827486] [2021-08-06 20:11:27,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:11:27,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:11:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:11:27,815 INFO L87 Difference]: Start difference. First operand 72 states and 136 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) [2021-08-06 20:11:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:27,859 INFO L93 Difference]: Finished difference Result 457 states and 822 transitions. [2021-08-06 20:11:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:11:27,859 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 [2021-08-06 20:11:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:27,861 INFO L225 Difference]: With dead ends: 457 [2021-08-06 20:11:27,861 INFO L226 Difference]: Without dead ends: 441 [2021-08-06 20:11:27,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:11:27,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-06 20:11:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 361. [2021-08-06 20:11:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.0194444444444444) internal successors, (727), 360 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 727 transitions. [2021-08-06 20:11:27,868 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 727 transitions. Word has length 40 [2021-08-06 20:11:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:27,869 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 727 transitions. [2021-08-06 20:11:27,869 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) [2021-08-06 20:11:27,869 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 727 transitions. [2021-08-06 20:11:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:11:27,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:27,869 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:27,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:28,088 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 [2021-08-06 20:11:28,089 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash -205571420, now seen corresponding path program 28 times [2021-08-06 20:11:28,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:28,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747967396] [2021-08-06 20:11:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:28,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:28,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:28,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747967396] [2021-08-06 20:11:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747967396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:28,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449654717] [2021-08-06 20:11:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:11:28,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:28,866 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) [2021-08-06 20:11:28,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:11:29,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:11:29,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:29,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-06 20:11:29,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:29,547 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 [2021-08-06 20:11:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:29,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449654717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:29,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:29,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-08-06 20:11:29,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672551265] [2021-08-06 20:11:29,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:11:29,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:11:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:11:29,572 INFO L87 Difference]: Start difference. First operand 361 states and 727 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) [2021-08-06 20:11:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:31,126 INFO L93 Difference]: Finished difference Result 734 states and 1358 transitions. [2021-08-06 20:11:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:11:31,126 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 [2021-08-06 20:11:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:31,129 INFO L225 Difference]: With dead ends: 734 [2021-08-06 20:11:31,129 INFO L226 Difference]: Without dead ends: 499 [2021-08-06 20:11:31,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1752.0ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:11:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-06 20:11:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 76. [2021-08-06 20:11:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.92) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 144 transitions. [2021-08-06 20:11:31,135 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 144 transitions. Word has length 41 [2021-08-06 20:11:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:31,135 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 144 transitions. [2021-08-06 20:11:31,135 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) [2021-08-06 20:11:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 144 transitions. [2021-08-06 20:11:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 20:11:31,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:31,136 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:31,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 20:11:31,340 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 [2021-08-06 20:11:31,341 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2054668493, now seen corresponding path program 29 times [2021-08-06 20:11:31,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:31,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505676415] [2021-08-06 20:11:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:31,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:31,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:31,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505676415] [2021-08-06 20:11:31,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505676415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:31,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115466237] [2021-08-06 20:11:31,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:31,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:31,597 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) [2021-08-06 20:11:31,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:11:32,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 20:11:32,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:11:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:32,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:32,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:32,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115466237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:32,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:32,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-08-06 20:11:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869417323] [2021-08-06 20:11:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:11:32,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:11:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:11:32,324 INFO L87 Difference]: Start difference. First operand 76 states and 144 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) [2021-08-06 20:11:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:32,376 INFO L93 Difference]: Finished difference Result 502 states and 907 transitions. [2021-08-06 20:11:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:11:32,377 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 [2021-08-06 20:11:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:32,378 INFO L225 Difference]: With dead ends: 502 [2021-08-06 20:11:32,378 INFO L226 Difference]: Without dead ends: 485 [2021-08-06 20:11:32,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:11:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-06 20:11:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 400. [2021-08-06 20:11:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.020050125313283) internal successors, (806), 399 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 806 transitions. [2021-08-06 20:11:32,386 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 806 transitions. Word has length 42 [2021-08-06 20:11:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:32,386 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 806 transitions. [2021-08-06 20:11:32,386 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) [2021-08-06 20:11:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 806 transitions. [2021-08-06 20:11:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:11:32,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:32,387 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:32,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:32,609 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 [2021-08-06 20:11:32,609 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash 422845140, now seen corresponding path program 30 times [2021-08-06 20:11:32,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:32,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127605947] [2021-08-06 20:11:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:32,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:33,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:33,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127605947] [2021-08-06 20:11:33,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127605947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:33,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999211513] [2021-08-06 20:11:33,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:11:33,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:33,690 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) [2021-08-06 20:11:33,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:11:34,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 20:11:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 20:11:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:36,605 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:11:36,605 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 [2021-08-06 20:11:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:36,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999211513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:36,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:36,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-08-06 20:11:36,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809278308] [2021-08-06 20:11:36,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-06 20:11:36,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-06 20:11:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:11:36,632 INFO L87 Difference]: Start difference. First operand 400 states and 806 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) [2021-08-06 20:11:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:55,392 INFO L93 Difference]: Finished difference Result 3756 states and 6815 transitions. [2021-08-06 20:11:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-08-06 20:11:55,393 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 [2021-08-06 20:11:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:55,402 INFO L225 Difference]: With dead ends: 3756 [2021-08-06 20:11:55,402 INFO L226 Difference]: Without dead ends: 2648 [2021-08-06 20:11:55,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 19395.7ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-08-06 20:11:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-08-06 20:11:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 421. [2021-08-06 20:11:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.0238095238095237) internal successors, (850), 420 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 850 transitions. [2021-08-06 20:11:55,466 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 850 transitions. Word has length 43 [2021-08-06 20:11:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:55,466 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 850 transitions. [2021-08-06 20:11:55,467 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) [2021-08-06 20:11:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 850 transitions. [2021-08-06 20:11:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:11:55,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:55,467 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:55,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:55,668 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 [2021-08-06 20:11:55,668 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:11:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1725095012, now seen corresponding path program 31 times [2021-08-06 20:11:55,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:55,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953390874] [2021-08-06 20:11:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:55,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:56,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:56,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953390874] [2021-08-06 20:11:56,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953390874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:56,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220067303] [2021-08-06 20:11:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:56,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:56,659 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) [2021-08-06 20:11:56,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:11:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-06 20:11:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:57,720 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 [2021-08-06 20:11:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:57,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220067303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:57,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:57,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-08-06 20:11:57,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505663423] [2021-08-06 20:11:57,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:11:57,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:11:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:11:57,744 INFO L87 Difference]: Start difference. First operand 421 states and 850 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) [2021-08-06 20:12:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:00,026 INFO L93 Difference]: Finished difference Result 873 states and 1629 transitions. [2021-08-06 20:12:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:12:00,026 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 [2021-08-06 20:12:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:00,028 INFO L225 Difference]: With dead ends: 873 [2021-08-06 20:12:00,028 INFO L226 Difference]: Without dead ends: 612 [2021-08-06 20:12:00,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2449.4ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:12:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-06 20:12:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 84. [2021-08-06 20:12:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.927710843373494) internal successors, (160), 83 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 160 transitions. [2021-08-06 20:12:00,032 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 160 transitions. Word has length 45 [2021-08-06 20:12:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:00,033 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 160 transitions. [2021-08-06 20:12:00,033 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) [2021-08-06 20:12:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 160 transitions. [2021-08-06 20:12:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-06 20:12:00,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:00,033 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:00,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:00,256 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 [2021-08-06 20:12:00,257 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:00,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:00,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1961416051, now seen corresponding path program 32 times [2021-08-06 20:12:00,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:00,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545802432] [2021-08-06 20:12:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:00,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:00,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:00,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545802432] [2021-08-06 20:12:00,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545802432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:00,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134450810] [2021-08-06 20:12:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:12:00,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:00,551 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) [2021-08-06 20:12:00,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:12:01,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:12:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 20:12:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:01,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:12:01,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:12:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:01,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134450810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:01,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:01,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-08-06 20:12:01,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441102772] [2021-08-06 20:12:01,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:12:01,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:12:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:12:01,339 INFO L87 Difference]: Start difference. First operand 84 states and 160 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) [2021-08-06 20:12:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:01,389 INFO L93 Difference]: Finished difference Result 598 states and 1089 transitions. [2021-08-06 20:12:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:12:01,390 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 [2021-08-06 20:12:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:01,391 INFO L225 Difference]: With dead ends: 598 [2021-08-06 20:12:01,391 INFO L226 Difference]: Without dead ends: 579 [2021-08-06 20:12:01,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:12:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-06 20:12:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 484. [2021-08-06 20:12:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.020703933747412) internal successors, (976), 483 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 976 transitions. [2021-08-06 20:12:01,399 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 976 transitions. Word has length 46 [2021-08-06 20:12:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:01,399 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 976 transitions. [2021-08-06 20:12:01,399 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) [2021-08-06 20:12:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 976 transitions. [2021-08-06 20:12:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 20:12:01,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:01,400 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:01,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:01,616 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 [2021-08-06 20:12:01,617 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1376516244, now seen corresponding path program 33 times [2021-08-06 20:12:01,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:01,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819733447] [2021-08-06 20:12:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:01,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:02,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:02,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819733447] [2021-08-06 20:12:02,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819733447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:02,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645304599] [2021-08-06 20:12:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:12:02,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:02,592 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) [2021-08-06 20:12:02,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:12:03,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 20:12:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:03,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-06 20:12:03,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:03,453 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 [2021-08-06 20:12:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:03,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645304599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:03,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:03,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-08-06 20:12:03,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185274680] [2021-08-06 20:12:03,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 20:12:03,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:03,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 20:12:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:12:03,476 INFO L87 Difference]: Start difference. First operand 484 states and 976 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) [2021-08-06 20:12:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:05,650 INFO L93 Difference]: Finished difference Result 983 states and 1838 transitions. [2021-08-06 20:12:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:12:05,651 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 [2021-08-06 20:12:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:05,653 INFO L225 Difference]: With dead ends: 983 [2021-08-06 20:12:05,653 INFO L226 Difference]: Without dead ends: 676 [2021-08-06 20:12:05,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2355.2ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:12:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-06 20:12:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 88. [2021-08-06 20:12:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9310344827586208) internal successors, (168), 87 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 168 transitions. [2021-08-06 20:12:05,657 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 168 transitions. Word has length 47 [2021-08-06 20:12:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:05,657 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 168 transitions. [2021-08-06 20:12:05,657 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) [2021-08-06 20:12:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 168 transitions. [2021-08-06 20:12:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 20:12:05,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:05,658 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:05,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:05,872 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 [2021-08-06 20:12:05,873 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:05,873 INFO L82 PathProgramCache]: Analyzing trace with hash -254591165, now seen corresponding path program 34 times [2021-08-06 20:12:05,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:05,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004215261] [2021-08-06 20:12:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:05,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:06,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:06,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004215261] [2021-08-06 20:12:06,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004215261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:06,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613134922] [2021-08-06 20:12:06,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:12:06,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:06,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:06,178 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) [2021-08-06 20:12:06,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:12:06,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:12:06,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 20:12:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:06,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:12:06,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:12:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:06,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613134922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:06,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:06,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-08-06 20:12:06,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478469525] [2021-08-06 20:12:06,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:12:06,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:12:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:12:06,973 INFO L87 Difference]: Start difference. First operand 88 states and 168 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) [2021-08-06 20:12:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:07,033 INFO L93 Difference]: Finished difference Result 649 states and 1186 transitions. [2021-08-06 20:12:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:12:07,033 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 [2021-08-06 20:12:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:07,035 INFO L225 Difference]: With dead ends: 649 [2021-08-06 20:12:07,035 INFO L226 Difference]: Without dead ends: 629 [2021-08-06 20:12:07,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:12:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-06 20:12:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 529. [2021-08-06 20:12:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.0208333333333335) internal successors, (1067), 528 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1067 transitions. [2021-08-06 20:12:07,042 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1067 transitions. Word has length 48 [2021-08-06 20:12:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:07,043 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1067 transitions. [2021-08-06 20:12:07,043 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) [2021-08-06 20:12:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1067 transitions. [2021-08-06 20:12:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:12:07,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:07,044 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:07,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:07,268 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 [2021-08-06 20:12:07,269 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash 297410084, now seen corresponding path program 35 times [2021-08-06 20:12:07,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:07,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161086073] [2021-08-06 20:12:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:07,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:08,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:08,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161086073] [2021-08-06 20:12:08,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161086073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:08,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085547375] [2021-08-06 20:12:08,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:12:08,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:08,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:08,248 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) [2021-08-06 20:12:08,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:12:08,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 20:12:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:12:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:11,636 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:12:11,637 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 [2021-08-06 20:12:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:11,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085547375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:11,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:11,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-08-06 20:12:11,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477814164] [2021-08-06 20:12:11,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-06 20:12:11,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-06 20:12:11,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 20:12:11,660 INFO L87 Difference]: Start difference. First operand 529 states and 1067 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) [2021-08-06 20:12:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:39,666 INFO L93 Difference]: Finished difference Result 5486 states and 10065 transitions. [2021-08-06 20:12:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-08-06 20:12:39,666 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 [2021-08-06 20:12:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:39,677 INFO L225 Difference]: With dead ends: 5486 [2021-08-06 20:12:39,677 INFO L226 Difference]: Without dead ends: 4003 [2021-08-06 20:12:39,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 28383.6ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-08-06 20:12:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-08-06 20:12:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 553. [2021-08-06 20:12:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.023550724637681) internal successors, (1117), 552 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1117 transitions. [2021-08-06 20:12:39,709 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1117 transitions. Word has length 49 [2021-08-06 20:12:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:39,709 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1117 transitions. [2021-08-06 20:12:39,709 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) [2021-08-06 20:12:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1117 transitions. [2021-08-06 20:12:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 20:12:39,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:39,711 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:39,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 20:12:39,924 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 [2021-08-06 20:12:39,925 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:12:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1449888172, now seen corresponding path program 36 times [2021-08-06 20:12:39,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:39,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847713181] [2021-08-06 20:12:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:39,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:41,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:41,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847713181] [2021-08-06 20:12:41,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847713181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:41,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683921285] [2021-08-06 20:12:41,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:12:41,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:41,004 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) [2021-08-06 20:12:41,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:12:41,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-06 20:12:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:41,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:12:41,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:45,031 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:12:45,031 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 [2021-08-06 20:12:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 210 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:12:45,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683921285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:45,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:45,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2021-08-06 20:12:45,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670275256] [2021-08-06 20:12:45,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-06 20:12:45,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-06 20:12:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=6450, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 20:12:45,056 INFO L87 Difference]: Start difference. First operand 553 states and 1117 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) [2021-08-06 20:13:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:19,683 INFO L93 Difference]: Finished difference Result 6139 states and 11296 transitions. [2021-08-06 20:13:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-08-06 20:13:19,684 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 [2021-08-06 20:13:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:19,701 INFO L225 Difference]: With dead ends: 6139 [2021-08-06 20:13:19,701 INFO L226 Difference]: Without dead ends: 4540 [2021-08-06 20:13:19,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48420 ImplicationChecksByTransitivity, 35159.4ms TimeCoverageRelationStatistics Valid=24975, Invalid=120567, Unknown=0, NotChecked=0, Total=145542 [2021-08-06 20:13:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-08-06 20:13:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 601. [2021-08-06 20:13:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.0233333333333334) internal successors, (1214), 600 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1214 transitions. [2021-08-06 20:13:19,737 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1214 transitions. Word has length 51 [2021-08-06 20:13:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:19,738 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1214 transitions. [2021-08-06 20:13:19,738 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) [2021-08-06 20:13:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1214 transitions. [2021-08-06 20:13:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 20:13:19,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:19,739 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:19,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:19,960 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 [2021-08-06 20:13:19,961 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash 218431460, now seen corresponding path program 37 times [2021-08-06 20:13:19,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:19,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478763776] [2021-08-06 20:13:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:19,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:21,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:21,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478763776] [2021-08-06 20:13:21,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478763776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:21,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959099581] [2021-08-06 20:13:21,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:13:21,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:21,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:21,418 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) [2021-08-06 20:13:21,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:13:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:22,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-06 20:13:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:22,633 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 [2021-08-06 20:13:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:22,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959099581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:22,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:22,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-08-06 20:13:22,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689551589] [2021-08-06 20:13:22,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 20:13:22,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 20:13:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:13:22,659 INFO L87 Difference]: Start difference. First operand 601 states and 1214 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) [2021-08-06 20:13:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:26,393 INFO L93 Difference]: Finished difference Result 1241 states and 2341 transitions. [2021-08-06 20:13:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:13:26,393 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 [2021-08-06 20:13:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:26,406 INFO L225 Difference]: With dead ends: 1241 [2021-08-06 20:13:26,407 INFO L226 Difference]: Without dead ends: 878 [2021-08-06 20:13:26,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3993.5ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 20:13:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-08-06 20:13:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 100. [2021-08-06 20:13:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 99 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 192 transitions. [2021-08-06 20:13:26,429 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 192 transitions. Word has length 53 [2021-08-06 20:13:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:26,429 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 192 transitions. [2021-08-06 20:13:26,429 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) [2021-08-06 20:13:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 192 transitions. [2021-08-06 20:13:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 20:13:26,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:26,430 INFO L512 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:26,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:26,631 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 [2021-08-06 20:13:26,631 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1795481101, now seen corresponding path program 38 times [2021-08-06 20:13:26,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:26,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476422680] [2021-08-06 20:13:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:26,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:27,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:27,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476422680] [2021-08-06 20:13:27,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476422680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:27,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116137727] [2021-08-06 20:13:27,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:13:27,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:27,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:27,230 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) [2021-08-06 20:13:27,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:13:28,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:13:28,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:13:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:28,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:13:28,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:13:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:28,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116137727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:28,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:28,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-08-06 20:13:28,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672746261] [2021-08-06 20:13:28,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:13:28,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:28,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:13:28,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:13:28,440 INFO L87 Difference]: Start difference. First operand 100 states and 192 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) [2021-08-06 20:13:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:28,523 INFO L93 Difference]: Finished difference Result 814 states and 1501 transitions. [2021-08-06 20:13:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:13:28,523 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 [2021-08-06 20:13:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:28,525 INFO L225 Difference]: With dead ends: 814 [2021-08-06 20:13:28,525 INFO L226 Difference]: Without dead ends: 791 [2021-08-06 20:13:28,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:13:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-06 20:13:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 676. [2021-08-06 20:13:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.0207407407407407) internal successors, (1364), 675 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1364 transitions. [2021-08-06 20:13:28,534 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1364 transitions. Word has length 54 [2021-08-06 20:13:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:28,534 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1364 transitions. [2021-08-06 20:13:28,534 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) [2021-08-06 20:13:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1364 transitions. [2021-08-06 20:13:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 20:13:28,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:28,536 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:28,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:28,748 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 [2021-08-06 20:13:28,749 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash 387814420, now seen corresponding path program 39 times [2021-08-06 20:13:28,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:28,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378357189] [2021-08-06 20:13:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:28,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:30,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:30,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378357189] [2021-08-06 20:13:30,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378357189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:30,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810055792] [2021-08-06 20:13:30,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:13:30,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:30,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:30,436 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) [2021-08-06 20:13:30,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:13:31,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-06 20:13:31,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-06 20:13:31,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:31,718 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 [2021-08-06 20:13:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:31,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810055792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:31,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:31,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-08-06 20:13:31,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193873357] [2021-08-06 20:13:31,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-06 20:13:31,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-06 20:13:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:13:31,746 INFO L87 Difference]: Start difference. First operand 676 states and 1364 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) [2021-08-06 20:13:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:35,227 INFO L93 Difference]: Finished difference Result 1371 states and 2590 transitions. [2021-08-06 20:13:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:13:35,227 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 [2021-08-06 20:13:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:35,229 INFO L225 Difference]: With dead ends: 1371 [2021-08-06 20:13:35,229 INFO L226 Difference]: Without dead ends: 954 [2021-08-06 20:13:35,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3933.8ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-08-06 20:13:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-06 20:13:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 104. [2021-08-06 20:13:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.941747572815534) internal successors, (200), 103 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 200 transitions. [2021-08-06 20:13:35,235 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 200 transitions. Word has length 55 [2021-08-06 20:13:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:35,235 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 200 transitions. [2021-08-06 20:13:35,235 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) [2021-08-06 20:13:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 200 transitions. [2021-08-06 20:13:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-06 20:13:35,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:35,236 INFO L512 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:35,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 20:13:35,436 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 [2021-08-06 20:13:35,437 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash -839576637, now seen corresponding path program 40 times [2021-08-06 20:13:35,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:35,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647756234] [2021-08-06 20:13:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:35,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:35,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:35,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647756234] [2021-08-06 20:13:35,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647756234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:35,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739305001] [2021-08-06 20:13:35,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:13:35,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:35,929 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) [2021-08-06 20:13:35,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:13:36,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:13:37,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:13:37,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:37,317 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:13:37,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:13:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:37,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739305001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:37,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:37,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-08-06 20:13:37,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348145614] [2021-08-06 20:13:37,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:13:37,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:13:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:13:37,337 INFO L87 Difference]: Start difference. First operand 104 states and 200 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) [2021-08-06 20:13:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:37,405 INFO L93 Difference]: Finished difference Result 873 states and 1614 transitions. [2021-08-06 20:13:37,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:13:37,405 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 [2021-08-06 20:13:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:37,406 INFO L225 Difference]: With dead ends: 873 [2021-08-06 20:13:37,406 INFO L226 Difference]: Without dead ends: 849 [2021-08-06 20:13:37,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:13:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-08-06 20:13:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 729. [2021-08-06 20:13:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.0206043956043955) internal successors, (1471), 728 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1471 transitions. [2021-08-06 20:13:37,415 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1471 transitions. Word has length 56 [2021-08-06 20:13:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:37,415 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1471 transitions. [2021-08-06 20:13:37,416 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) [2021-08-06 20:13:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1471 transitions. [2021-08-06 20:13:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 20:13:37,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:37,417 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:37,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:37,631 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 [2021-08-06 20:13:37,631 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:13:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1363378596, now seen corresponding path program 41 times [2021-08-06 20:13:37,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:37,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612467242] [2021-08-06 20:13:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:37,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:39,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:39,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612467242] [2021-08-06 20:13:39,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612467242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:39,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976081589] [2021-08-06 20:13:39,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:13:39,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:39,114 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) [2021-08-06 20:13:39,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:13:39,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-06 20:13:39,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 20:13:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:44,296 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:13:44,296 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 [2021-08-06 20:13:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 276 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976081589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:44,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:44,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-08-06 20:13:44,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326424765] [2021-08-06 20:13:44,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-06 20:13:44,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-06 20:13:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1323, Invalid=8379, Unknown=0, NotChecked=0, Total=9702 [2021-08-06 20:13:44,329 INFO L87 Difference]: Start difference. First operand 729 states and 1471 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) [2021-08-06 20:14:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:38,145 INFO L93 Difference]: Finished difference Result 8516 states and 15803 transitions. [2021-08-06 20:14:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-08-06 20:14:38,146 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 [2021-08-06 20:14:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:38,158 INFO L225 Difference]: With dead ends: 8516 [2021-08-06 20:14:38,158 INFO L226 Difference]: Without dead ends: 6449 [2021-08-06 20:14:38,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76712 ImplicationChecksByTransitivity, 53944.7ms TimeCoverageRelationStatistics Valid=37944, Invalid=184368, Unknown=0, NotChecked=0, Total=222312 [2021-08-06 20:14:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-08-06 20:14:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 757. [2021-08-06 20:14:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.0224867724867726) internal successors, (1529), 756 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1529 transitions. [2021-08-06 20:14:38,209 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1529 transitions. Word has length 57 [2021-08-06 20:14:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:38,211 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1529 transitions. [2021-08-06 20:14:38,211 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) [2021-08-06 20:14:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1529 transitions. [2021-08-06 20:14:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 20:14:38,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:38,213 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:38,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:38,425 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 [2021-08-06 20:14:38,426 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756268, now seen corresponding path program 42 times [2021-08-06 20:14:38,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:38,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310157685] [2021-08-06 20:14:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:38,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:40,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:40,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310157685] [2021-08-06 20:14:40,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310157685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:40,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669934825] [2021-08-06 20:14:40,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:14:40,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:40,201 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) [2021-08-06 20:14:40,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:14:41,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-06 20:14:41,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:41,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-08-06 20:14:41,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:41,634 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 [2021-08-06 20:14:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:41,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669934825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:41,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:41,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-08-06 20:14:41,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137451360] [2021-08-06 20:14:41,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-06 20:14:41,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-06 20:14:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:14:41,658 INFO L87 Difference]: Start difference. First operand 757 states and 1529 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) [2021-08-06 20:14:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:46,527 INFO L93 Difference]: Finished difference Result 1559 states and 2959 transitions. [2021-08-06 20:14:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:14:46,527 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 [2021-08-06 20:14:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:46,529 INFO L225 Difference]: With dead ends: 1559 [2021-08-06 20:14:46,529 INFO L226 Difference]: Without dead ends: 1109 [2021-08-06 20:14:46,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5180.3ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-08-06 20:14:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-06 20:14:46,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 112. [2021-08-06 20:14:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.945945945945946) internal successors, (216), 111 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) [2021-08-06 20:14:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 216 transitions. [2021-08-06 20:14:46,534 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 216 transitions. Word has length 59 [2021-08-06 20:14:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:46,534 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 216 transitions. [2021-08-06 20:14:46,534 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) [2021-08-06 20:14:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 216 transitions. [2021-08-06 20:14:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-06 20:14:46,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:46,534 INFO L512 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:46,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:46,735 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 [2021-08-06 20:14:46,735 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:46,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2119372291, now seen corresponding path program 43 times [2021-08-06 20:14:46,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:46,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283563439] [2021-08-06 20:14:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:46,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:47,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:47,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283563439] [2021-08-06 20:14:47,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283563439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:47,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944666060] [2021-08-06 20:14:47,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:14:47,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:47,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:47,598 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) [2021-08-06 20:14:47,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:14:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:14:48,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:49,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:14:49,006 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:14:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:49,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944666060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:49,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:49,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-08-06 20:14:49,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071492980] [2021-08-06 20:14:49,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:14:49,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:14:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:14:49,028 INFO L87 Difference]: Start difference. First operand 112 states and 216 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) [2021-08-06 20:14:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:49,126 INFO L93 Difference]: Finished difference Result 997 states and 1852 transitions. [2021-08-06 20:14:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:14:49,127 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 [2021-08-06 20:14:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:49,129 INFO L225 Difference]: With dead ends: 997 [2021-08-06 20:14:49,129 INFO L226 Difference]: Without dead ends: 971 [2021-08-06 20:14:49,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:14:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-08-06 20:14:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 841. [2021-08-06 20:14:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.020238095238095) internal successors, (1697), 840 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1697 transitions. [2021-08-06 20:14:49,141 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1697 transitions. Word has length 60 [2021-08-06 20:14:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:49,141 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1697 transitions. [2021-08-06 20:14:49,141 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) [2021-08-06 20:14:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1697 transitions. [2021-08-06 20:14:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-06 20:14:49,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:49,143 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:49,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 20:14:49,369 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 [2021-08-06 20:14:49,369 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1224367260, now seen corresponding path program 44 times [2021-08-06 20:14:49,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:49,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692799322] [2021-08-06 20:14:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:49,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:51,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:51,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692799322] [2021-08-06 20:14:51,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692799322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:51,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585363307] [2021-08-06 20:14:51,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:14:51,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:51,174 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) [2021-08-06 20:14:51,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:14:52,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:14:52,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-08-06 20:14:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:52,778 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 [2021-08-06 20:14:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585363307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:52,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:52,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-08-06 20:14:52,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220090312] [2021-08-06 20:14:52,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-06 20:14:52,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-06 20:14:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:14:52,804 INFO L87 Difference]: Start difference. First operand 841 states and 1697 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) [2021-08-06 20:14:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:58,267 INFO L93 Difference]: Finished difference Result 1704 states and 3238 transitions. [2021-08-06 20:14:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:14:58,268 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 [2021-08-06 20:14:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:58,288 INFO L225 Difference]: With dead ends: 1704 [2021-08-06 20:14:58,288 INFO L226 Difference]: Without dead ends: 1194 [2021-08-06 20:14:58,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 5670.3ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 20:14:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-08-06 20:14:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 116. [2021-08-06 20:14:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.9478260869565218) internal successors, (224), 115 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 224 transitions. [2021-08-06 20:14:58,305 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 224 transitions. Word has length 61 [2021-08-06 20:14:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:58,305 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 224 transitions. [2021-08-06 20:14:58,305 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) [2021-08-06 20:14:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 224 transitions. [2021-08-06 20:14:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 20:14:58,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:58,305 INFO L512 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:58,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:58,506 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 [2021-08-06 20:14:58,506 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:14:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash 722398835, now seen corresponding path program 45 times [2021-08-06 20:14:58,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:58,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852429263] [2021-08-06 20:14:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:58,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:59,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:59,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852429263] [2021-08-06 20:14:59,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852429263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:59,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653517892] [2021-08-06 20:14:59,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:14:59,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:59,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:59,131 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) [2021-08-06 20:14:59,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:15:00,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-06 20:15:00,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:00,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 20:15:00,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:00,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:00,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:00,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653517892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:00,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:00,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-08-06 20:15:00,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115359458] [2021-08-06 20:15:00,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:15:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:15:00,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:15:00,447 INFO L87 Difference]: Start difference. First operand 116 states and 224 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) [2021-08-06 20:15:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:00,531 INFO L93 Difference]: Finished difference Result 1062 states and 1977 transitions. [2021-08-06 20:15:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:15:00,531 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 [2021-08-06 20:15:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:00,533 INFO L225 Difference]: With dead ends: 1062 [2021-08-06 20:15:00,533 INFO L226 Difference]: Without dead ends: 1035 [2021-08-06 20:15:00,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:15:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-08-06 20:15:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 900. [2021-08-06 20:15:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.020022246941046) internal successors, (1816), 899 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1816 transitions. [2021-08-06 20:15:00,547 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1816 transitions. Word has length 62 [2021-08-06 20:15:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:00,547 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1816 transitions. [2021-08-06 20:15:00,547 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) [2021-08-06 20:15:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1816 transitions. [2021-08-06 20:15:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-06 20:15:00,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:00,548 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:00,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:00,768 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 [2021-08-06 20:15:00,769 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:00,769 INFO L82 PathProgramCache]: Analyzing trace with hash 24227732, now seen corresponding path program 46 times [2021-08-06 20:15:00,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:00,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148035475] [2021-08-06 20:15:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:00,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:02,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:02,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148035475] [2021-08-06 20:15:02,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148035475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:02,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657112264] [2021-08-06 20:15:02,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:15:02,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:02,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:02,815 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) [2021-08-06 20:15:02,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:15:03,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-08-06 20:15:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:04,235 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 [2021-08-06 20:15:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:04,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657112264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:04,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:04,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-08-06 20:15:04,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912767422] [2021-08-06 20:15:04,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-06 20:15:04,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-06 20:15:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:15:04,258 INFO L87 Difference]: Start difference. First operand 900 states and 1816 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) [2021-08-06 20:15:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:09,430 INFO L93 Difference]: Finished difference Result 1823 states and 3470 transitions. [2021-08-06 20:15:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:15:09,430 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 [2021-08-06 20:15:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:09,449 INFO L225 Difference]: With dead ends: 1823 [2021-08-06 20:15:09,450 INFO L226 Difference]: Without dead ends: 1280 [2021-08-06 20:15:09,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 5692.4ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 20:15:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-08-06 20:15:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 120. [2021-08-06 20:15:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.949579831932773) internal successors, (232), 119 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 232 transitions. [2021-08-06 20:15:09,458 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 232 transitions. Word has length 63 [2021-08-06 20:15:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:09,458 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 232 transitions. [2021-08-06 20:15:09,458 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) [2021-08-06 20:15:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 232 transitions. [2021-08-06 20:15:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-06 20:15:09,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:09,459 INFO L512 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:09,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:09,672 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 [2021-08-06 20:15:09,673 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:09,673 INFO L82 PathProgramCache]: Analyzing trace with hash 774137923, now seen corresponding path program 47 times [2021-08-06 20:15:09,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:09,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070928876] [2021-08-06 20:15:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:09,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:10,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:10,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070928876] [2021-08-06 20:15:10,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070928876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:10,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723883136] [2021-08-06 20:15:10,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:15:10,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:10,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:10,317 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) [2021-08-06 20:15:10,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:15:11,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-06 20:15:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-06 20:15:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:11,608 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:11,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:11,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723883136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:11,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:11,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-08-06 20:15:11,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101613810] [2021-08-06 20:15:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:15:11,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:15:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:15:11,669 INFO L87 Difference]: Start difference. First operand 120 states and 232 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) [2021-08-06 20:15:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:11,773 INFO L93 Difference]: Finished difference Result 1129 states and 2106 transitions. [2021-08-06 20:15:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:15:11,773 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 [2021-08-06 20:15:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:11,775 INFO L225 Difference]: With dead ends: 1129 [2021-08-06 20:15:11,775 INFO L226 Difference]: Without dead ends: 1101 [2021-08-06 20:15:11,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:15:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-08-06 20:15:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 961. [2021-08-06 20:15:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 2.019791666666667) internal successors, (1939), 960 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1939 transitions. [2021-08-06 20:15:11,785 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1939 transitions. Word has length 64 [2021-08-06 20:15:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:11,785 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1939 transitions. [2021-08-06 20:15:11,785 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) [2021-08-06 20:15:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1939 transitions. [2021-08-06 20:15:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 20:15:11,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:11,787 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:11,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:11,993 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 [2021-08-06 20:15:11,994 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -153393884, now seen corresponding path program 48 times [2021-08-06 20:15:11,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:11,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66014797] [2021-08-06 20:15:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:11,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:13,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:13,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66014797] [2021-08-06 20:15:13,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66014797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:13,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215233961] [2021-08-06 20:15:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:15:13,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:13,765 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) [2021-08-06 20:15:13,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:15:14,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-06 20:15:14,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 117 conjunts are in the unsatisfiable core [2021-08-06 20:15:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:15,249 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 [2021-08-06 20:15:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215233961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:15,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:15,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-08-06 20:15:15,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257826321] [2021-08-06 20:15:15,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-06 20:15:15,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:15,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-06 20:15:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:15:15,272 INFO L87 Difference]: Start difference. First operand 961 states and 1939 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) [2021-08-06 20:15:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:20,389 INFO L93 Difference]: Finished difference Result 1946 states and 3710 transitions. [2021-08-06 20:15:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:15:20,389 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 [2021-08-06 20:15:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:20,392 INFO L225 Difference]: With dead ends: 1946 [2021-08-06 20:15:20,392 INFO L226 Difference]: Without dead ends: 1369 [2021-08-06 20:15:20,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5410.5ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-08-06 20:15:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-08-06 20:15:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 124. [2021-08-06 20:15:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 240 transitions. [2021-08-06 20:15:20,402 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 240 transitions. Word has length 65 [2021-08-06 20:15:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:20,402 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 240 transitions. [2021-08-06 20:15:20,402 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) [2021-08-06 20:15:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 240 transitions. [2021-08-06 20:15:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-06 20:15:20,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:20,403 INFO L512 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:20,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:20,616 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 [2021-08-06 20:15:20,617 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash -437164877, now seen corresponding path program 49 times [2021-08-06 20:15:20,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:20,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532103358] [2021-08-06 20:15:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:20,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:21,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:21,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532103358] [2021-08-06 20:15:21,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532103358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:21,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980387420] [2021-08-06 20:15:21,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:15:21,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:21,241 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) [2021-08-06 20:15:21,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:15:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:22,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:15:22,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:22,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:22,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:22,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980387420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:22,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:22,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-08-06 20:15:22,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30947420] [2021-08-06 20:15:22,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:15:22,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:22,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:15:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:15:22,614 INFO L87 Difference]: Start difference. First operand 124 states and 240 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) [2021-08-06 20:15:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:22,707 INFO L93 Difference]: Finished difference Result 1198 states and 2239 transitions. [2021-08-06 20:15:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:15:22,708 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 [2021-08-06 20:15:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:22,709 INFO L225 Difference]: With dead ends: 1198 [2021-08-06 20:15:22,709 INFO L226 Difference]: Without dead ends: 1169 [2021-08-06 20:15:22,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:15:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-08-06 20:15:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1024. [2021-08-06 20:15:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.0195503421309873) internal successors, (2066), 1023 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2066 transitions. [2021-08-06 20:15:22,719 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2066 transitions. Word has length 66 [2021-08-06 20:15:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:22,719 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 2066 transitions. [2021-08-06 20:15:22,719 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) [2021-08-06 20:15:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2066 transitions. [2021-08-06 20:15:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 20:15:22,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:22,721 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:22,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:22,928 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 [2021-08-06 20:15:22,929 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1557966164, now seen corresponding path program 50 times [2021-08-06 20:15:22,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:22,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896940612] [2021-08-06 20:15:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:22,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:24,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:24,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896940612] [2021-08-06 20:15:24,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896940612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:24,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857391455] [2021-08-06 20:15:24,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:15:24,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:24,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:24,923 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) [2021-08-06 20:15:24,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:15:25,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:15:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-08-06 20:15:25,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:26,506 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 [2021-08-06 20:15:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:26,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857391455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:26,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:26,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-08-06 20:15:26,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868136942] [2021-08-06 20:15:26,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-06 20:15:26,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-06 20:15:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:15:26,558 INFO L87 Difference]: Start difference. First operand 1024 states and 2066 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) [2021-08-06 20:15:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:33,534 INFO L93 Difference]: Finished difference Result 2073 states and 3958 transitions. [2021-08-06 20:15:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 20:15:33,535 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 [2021-08-06 20:15:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:33,537 INFO L225 Difference]: With dead ends: 2073 [2021-08-06 20:15:33,537 INFO L226 Difference]: Without dead ends: 1461 [2021-08-06 20:15:33,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 7042.8ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-08-06 20:15:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-08-06 20:15:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 128. [2021-08-06 20:15:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.952755905511811) internal successors, (248), 127 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 248 transitions. [2021-08-06 20:15:33,547 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 248 transitions. Word has length 67 [2021-08-06 20:15:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:33,547 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 248 transitions. [2021-08-06 20:15:33,547 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) [2021-08-06 20:15:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 248 transitions. [2021-08-06 20:15:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-06 20:15:33,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:33,548 INFO L512 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:33,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 20:15:33,760 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 [2021-08-06 20:15:33,761 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1075389059, now seen corresponding path program 51 times [2021-08-06 20:15:33,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:33,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726094383] [2021-08-06 20:15:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:33,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:34,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:34,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726094383] [2021-08-06 20:15:34,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726094383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:34,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362850169] [2021-08-06 20:15:34,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:15:34,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:34,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:34,521 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) [2021-08-06 20:15:34,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:15:35,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-06 20:15:35,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:35,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-06 20:15:35,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:36,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:36,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:36,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362850169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:36,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:36,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-08-06 20:15:36,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441873510] [2021-08-06 20:15:36,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:15:36,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:36,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:15:36,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:15:36,226 INFO L87 Difference]: Start difference. First operand 128 states and 248 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) [2021-08-06 20:15:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:36,370 INFO L93 Difference]: Finished difference Result 1269 states and 2376 transitions. [2021-08-06 20:15:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:15:36,371 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 [2021-08-06 20:15:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:36,373 INFO L225 Difference]: With dead ends: 1269 [2021-08-06 20:15:36,373 INFO L226 Difference]: Without dead ends: 1239 [2021-08-06 20:15:36,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:15:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-08-06 20:15:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1089. [2021-08-06 20:15:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 2.0193014705882355) internal successors, (2197), 1088 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 2197 transitions. [2021-08-06 20:15:36,411 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 2197 transitions. Word has length 68 [2021-08-06 20:15:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:36,411 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 2197 transitions. [2021-08-06 20:15:36,411 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) [2021-08-06 20:15:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 2197 transitions. [2021-08-06 20:15:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-06 20:15:36,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:36,413 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:36,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:36,632 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 [2021-08-06 20:15:36,633 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1454061852, now seen corresponding path program 52 times [2021-08-06 20:15:36,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:36,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456210023] [2021-08-06 20:15:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:36,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:39,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:39,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456210023] [2021-08-06 20:15:39,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456210023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:39,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281010336] [2021-08-06 20:15:39,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:15:39,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:39,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:39,313 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) [2021-08-06 20:15:39,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:15:40,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-08-06 20:15:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:41,172 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 [2021-08-06 20:15:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:41,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281010336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:41,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:41,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-08-06 20:15:41,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965947942] [2021-08-06 20:15:41,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-06 20:15:41,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:41,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-06 20:15:41,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:15:41,198 INFO L87 Difference]: Start difference. First operand 1089 states and 2197 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) [2021-08-06 20:15:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:47,570 INFO L93 Difference]: Finished difference Result 2204 states and 4214 transitions. [2021-08-06 20:15:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:15:47,570 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 [2021-08-06 20:15:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:47,572 INFO L225 Difference]: With dead ends: 2204 [2021-08-06 20:15:47,572 INFO L226 Difference]: Without dead ends: 1556 [2021-08-06 20:15:47,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 7121.9ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 20:15:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-08-06 20:15:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 132. [2021-08-06 20:15:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.9541984732824427) internal successors, (256), 131 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) [2021-08-06 20:15:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 256 transitions. [2021-08-06 20:15:47,579 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 256 transitions. Word has length 69 [2021-08-06 20:15:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:47,579 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 256 transitions. [2021-08-06 20:15:47,579 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) [2021-08-06 20:15:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 256 transitions. [2021-08-06 20:15:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 20:15:47,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:47,580 INFO L512 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:47,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:15:47,780 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 [2021-08-06 20:15:47,780 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2103166221, now seen corresponding path program 53 times [2021-08-06 20:15:47,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:47,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035158962] [2021-08-06 20:15:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:47,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:48,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:48,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035158962] [2021-08-06 20:15:48,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035158962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:48,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47544109] [2021-08-06 20:15:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:15:48,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:48,384 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) [2021-08-06 20:15:48,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:15:49,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-06 20:15:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-06 20:15:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:49,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:49,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:49,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47544109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:49,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:49,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-08-06 20:15:49,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940846820] [2021-08-06 20:15:49,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 20:15:49,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:49,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 20:15:49,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:15:49,916 INFO L87 Difference]: Start difference. First operand 132 states and 256 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) [2021-08-06 20:15:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:50,023 INFO L93 Difference]: Finished difference Result 1342 states and 2517 transitions. [2021-08-06 20:15:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:15:50,023 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 [2021-08-06 20:15:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:50,025 INFO L225 Difference]: With dead ends: 1342 [2021-08-06 20:15:50,025 INFO L226 Difference]: Without dead ends: 1311 [2021-08-06 20:15:50,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:15:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-08-06 20:15:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1156. [2021-08-06 20:15:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.019047619047619) internal successors, (2332), 1155 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2332 transitions. [2021-08-06 20:15:50,036 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2332 transitions. Word has length 70 [2021-08-06 20:15:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:50,037 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 2332 transitions. [2021-08-06 20:15:50,037 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) [2021-08-06 20:15:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2332 transitions. [2021-08-06 20:15:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-06 20:15:50,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:50,038 INFO L512 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:50,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:50,265 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 [2021-08-06 20:15:50,265 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1954002156, now seen corresponding path program 54 times [2021-08-06 20:15:50,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:50,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304117193] [2021-08-06 20:15:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:50,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:52,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:52,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304117193] [2021-08-06 20:15:52,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304117193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:52,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060858088] [2021-08-06 20:15:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:15:52,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:52,428 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) [2021-08-06 20:15:52,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:15:53,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-08-06 20:15:53,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:53,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-08-06 20:15:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:54,138 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 [2021-08-06 20:15:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:54,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060858088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:54,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:54,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-08-06 20:15:54,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252947337] [2021-08-06 20:15:54,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-08-06 20:15:54,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:54,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-08-06 20:15:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 20:15:54,161 INFO L87 Difference]: Start difference. First operand 1156 states and 2332 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) [2021-08-06 20:16:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:00,671 INFO L93 Difference]: Finished difference Result 2339 states and 4478 transitions. [2021-08-06 20:16:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 20:16:00,671 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 [2021-08-06 20:16:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:00,674 INFO L225 Difference]: With dead ends: 2339 [2021-08-06 20:16:00,674 INFO L226 Difference]: Without dead ends: 1654 [2021-08-06 20:16:00,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6838.0ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-08-06 20:16:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-08-06 20:16:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 136. [2021-08-06 20:16:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9555555555555555) internal successors, (264), 135 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 264 transitions. [2021-08-06 20:16:00,683 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 264 transitions. Word has length 71 [2021-08-06 20:16:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:00,684 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 264 transitions. [2021-08-06 20:16:00,684 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) [2021-08-06 20:16:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 264 transitions. [2021-08-06 20:16:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 20:16:00,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:00,684 INFO L512 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:00,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:00,884 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 [2021-08-06 20:16:00,885 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:00,885 INFO L82 PathProgramCache]: Analyzing trace with hash -421446461, now seen corresponding path program 55 times [2021-08-06 20:16:00,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:00,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583448101] [2021-08-06 20:16:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:00,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:01,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:01,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583448101] [2021-08-06 20:16:01,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583448101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:01,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689122589] [2021-08-06 20:16:01,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:01,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:01,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:01,512 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) [2021-08-06 20:16:01,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:16:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:02,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-06 20:16:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:03,094 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:03,095 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:03,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689122589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:03,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:03,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-08-06 20:16:03,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851190354] [2021-08-06 20:16:03,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:16:03,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:16:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:16:03,117 INFO L87 Difference]: Start difference. First operand 136 states and 264 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) [2021-08-06 20:16:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:03,223 INFO L93 Difference]: Finished difference Result 1417 states and 2662 transitions. [2021-08-06 20:16:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:16:03,223 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 [2021-08-06 20:16:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:03,225 INFO L225 Difference]: With dead ends: 1417 [2021-08-06 20:16:03,225 INFO L226 Difference]: Without dead ends: 1385 [2021-08-06 20:16:03,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:16:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-08-06 20:16:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1225. [2021-08-06 20:16:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.0187908496732025) internal successors, (2471), 1224 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2471 transitions. [2021-08-06 20:16:03,237 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2471 transitions. Word has length 72 [2021-08-06 20:16:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:03,237 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 2471 transitions. [2021-08-06 20:16:03,237 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) [2021-08-06 20:16:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2471 transitions. [2021-08-06 20:16:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-06 20:16:03,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:03,239 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:03,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 20:16:03,464 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 [2021-08-06 20:16:03,465 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:03,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1191299236, now seen corresponding path program 56 times [2021-08-06 20:16:03,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:03,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565571854] [2021-08-06 20:16:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:03,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:05,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:05,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565571854] [2021-08-06 20:16:05,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565571854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:05,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889651626] [2021-08-06 20:16:05,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:05,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:05,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:05,658 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) [2021-08-06 20:16:05,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:16:06,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:06,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-08-06 20:16:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:07,435 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 [2021-08-06 20:16:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:07,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889651626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:07,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:07,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-08-06 20:16:07,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239041323] [2021-08-06 20:16:07,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-06 20:16:07,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-06 20:16:07,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:16:07,459 INFO L87 Difference]: Start difference. First operand 1225 states and 2471 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) [2021-08-06 20:16:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:16,013 INFO L93 Difference]: Finished difference Result 2478 states and 4750 transitions. [2021-08-06 20:16:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 20:16:16,013 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 [2021-08-06 20:16:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:16,016 INFO L225 Difference]: With dead ends: 2478 [2021-08-06 20:16:16,016 INFO L226 Difference]: Without dead ends: 1755 [2021-08-06 20:16:16,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 8494.2ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-08-06 20:16:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-08-06 20:16:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 140. [2021-08-06 20:16:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.9568345323741008) internal successors, (272), 139 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 272 transitions. [2021-08-06 20:16:16,024 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 272 transitions. Word has length 73 [2021-08-06 20:16:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:16,025 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 272 transitions. [2021-08-06 20:16:16,025 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) [2021-08-06 20:16:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 272 transitions. [2021-08-06 20:16:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-06 20:16:16,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:16,025 INFO L512 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:16,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:16,242 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 [2021-08-06 20:16:16,243 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1701351117, now seen corresponding path program 57 times [2021-08-06 20:16:16,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:16,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621862651] [2021-08-06 20:16:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:16,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:17,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:17,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621862651] [2021-08-06 20:16:17,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621862651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:17,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627563603] [2021-08-06 20:16:17,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:16:17,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:17,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:17,009 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) [2021-08-06 20:16:17,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:16:18,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-06 20:16:18,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:18,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-06 20:16:18,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:18,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:18,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:18,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627563603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:18,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:18,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-08-06 20:16:18,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461409421] [2021-08-06 20:16:18,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:16:18,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:16:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:16:18,974 INFO L87 Difference]: Start difference. First operand 140 states and 272 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) [2021-08-06 20:16:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:19,091 INFO L93 Difference]: Finished difference Result 1494 states and 2811 transitions. [2021-08-06 20:16:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:16:19,093 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 [2021-08-06 20:16:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:19,094 INFO L225 Difference]: With dead ends: 1494 [2021-08-06 20:16:19,094 INFO L226 Difference]: Without dead ends: 1461 [2021-08-06 20:16:19,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:16:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-08-06 20:16:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1296. [2021-08-06 20:16:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 2.0185328185328184) internal successors, (2614), 1295 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 2614 transitions. [2021-08-06 20:16:19,108 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 2614 transitions. Word has length 74 [2021-08-06 20:16:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:19,108 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 2614 transitions. [2021-08-06 20:16:19,108 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) [2021-08-06 20:16:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 2614 transitions. [2021-08-06 20:16:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 20:16:19,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:19,110 INFO L512 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:19,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:19,336 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 [2021-08-06 20:16:19,337 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1959037140, now seen corresponding path program 58 times [2021-08-06 20:16:19,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:19,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883074894] [2021-08-06 20:16:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:19,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:22,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:22,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883074894] [2021-08-06 20:16:22,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883074894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:22,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136651183] [2021-08-06 20:16:22,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:16:22,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:22,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:22,317 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) [2021-08-06 20:16:22,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:16:23,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:16:23,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-08-06 20:16:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:24,189 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 [2021-08-06 20:16:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:24,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136651183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:24,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:24,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-08-06 20:16:24,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541203453] [2021-08-06 20:16:24,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-06 20:16:24,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-06 20:16:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 20:16:24,212 INFO L87 Difference]: Start difference. First operand 1296 states and 2614 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) [2021-08-06 20:16:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:31,525 INFO L93 Difference]: Finished difference Result 2621 states and 5030 transitions. [2021-08-06 20:16:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 20:16:31,525 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 [2021-08-06 20:16:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:31,528 INFO L225 Difference]: With dead ends: 2621 [2021-08-06 20:16:31,528 INFO L226 Difference]: Without dead ends: 1859 [2021-08-06 20:16:31,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 8197.4ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-08-06 20:16:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-08-06 20:16:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 144. [2021-08-06 20:16:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.9580419580419581) internal successors, (280), 143 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 280 transitions. [2021-08-06 20:16:31,536 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 280 transitions. Word has length 75 [2021-08-06 20:16:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:31,536 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 280 transitions. [2021-08-06 20:16:31,536 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) [2021-08-06 20:16:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 280 transitions. [2021-08-06 20:16:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-06 20:16:31,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:31,536 INFO L512 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:31,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 20:16:31,737 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 [2021-08-06 20:16:31,737 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash 623687427, now seen corresponding path program 59 times [2021-08-06 20:16:31,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:31,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892101079] [2021-08-06 20:16:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:31,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:32,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:32,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892101079] [2021-08-06 20:16:32,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892101079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:32,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70491343] [2021-08-06 20:16:32,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:16:32,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:32,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:32,420 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) [2021-08-06 20:16:32,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:16:33,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-06 20:16:33,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-06 20:16:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:34,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:34,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:34,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70491343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:34,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:34,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-08-06 20:16:34,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186760851] [2021-08-06 20:16:34,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:16:34,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:34,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:16:34,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:16:34,255 INFO L87 Difference]: Start difference. First operand 144 states and 280 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) [2021-08-06 20:16:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:34,373 INFO L93 Difference]: Finished difference Result 1573 states and 2964 transitions. [2021-08-06 20:16:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:16:34,373 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 [2021-08-06 20:16:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:34,375 INFO L225 Difference]: With dead ends: 1573 [2021-08-06 20:16:34,375 INFO L226 Difference]: Without dead ends: 1539 [2021-08-06 20:16:34,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:16:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-08-06 20:16:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1369. [2021-08-06 20:16:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 2.0182748538011697) internal successors, (2761), 1368 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2761 transitions. [2021-08-06 20:16:34,386 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2761 transitions. Word has length 76 [2021-08-06 20:16:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:34,386 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2761 transitions. [2021-08-06 20:16:34,386 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) [2021-08-06 20:16:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2761 transitions. [2021-08-06 20:16:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-06 20:16:34,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:34,387 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:34,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 20:16:34,588 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 [2021-08-06 20:16:34,588 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash 678586980, now seen corresponding path program 60 times [2021-08-06 20:16:34,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:34,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580159443] [2021-08-06 20:16:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:34,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:37,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:37,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580159443] [2021-08-06 20:16:37,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580159443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:37,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907957897] [2021-08-06 20:16:37,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:16:37,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:37,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:37,945 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) [2021-08-06 20:16:37,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:16:39,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-06 20:16:39,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 141 conjunts are in the unsatisfiable core [2021-08-06 20:16:39,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:39,907 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 [2021-08-06 20:16:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:39,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907957897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:39,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:39,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-08-06 20:16:39,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378740682] [2021-08-06 20:16:39,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-06 20:16:39,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-06 20:16:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:16:39,930 INFO L87 Difference]: Start difference. First operand 1369 states and 2761 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) [2021-08-06 20:16:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:48,084 INFO L93 Difference]: Finished difference Result 2768 states and 5318 transitions. [2021-08-06 20:16:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 20:16:48,085 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 [2021-08-06 20:16:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:48,088 INFO L225 Difference]: With dead ends: 2768 [2021-08-06 20:16:48,088 INFO L226 Difference]: Without dead ends: 1966 [2021-08-06 20:16:48,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 9232.8ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-08-06 20:16:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-08-06 20:16:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 148. [2021-08-06 20:16:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.9591836734693877) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 288 transitions. [2021-08-06 20:16:48,097 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 288 transitions. Word has length 77 [2021-08-06 20:16:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:48,098 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 288 transitions. [2021-08-06 20:16:48,099 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) [2021-08-06 20:16:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 288 transitions. [2021-08-06 20:16:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-06 20:16:48,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:48,100 INFO L512 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:48,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:48,314 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 [2021-08-06 20:16:48,314 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash -415561869, now seen corresponding path program 61 times [2021-08-06 20:16:48,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:48,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476337386] [2021-08-06 20:16:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:48,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:49,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:49,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476337386] [2021-08-06 20:16:49,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476337386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:49,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146684374] [2021-08-06 20:16:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:49,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:49,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:49,453 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) [2021-08-06 20:16:49,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:16:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-06 20:16:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:51,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:51,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:16:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:51,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146684374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:51,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:51,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-08-06 20:16:51,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033529986] [2021-08-06 20:16:51,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 20:16:51,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:51,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 20:16:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:16:51,564 INFO L87 Difference]: Start difference. First operand 148 states and 288 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) [2021-08-06 20:16:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:51,714 INFO L93 Difference]: Finished difference Result 1654 states and 3121 transitions. [2021-08-06 20:16:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:16:51,715 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 [2021-08-06 20:16:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:51,717 INFO L225 Difference]: With dead ends: 1654 [2021-08-06 20:16:51,717 INFO L226 Difference]: Without dead ends: 1619 [2021-08-06 20:16:51,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:16:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-08-06 20:16:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1444. [2021-08-06 20:16:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.018018018018018) internal successors, (2912), 1443 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2912 transitions. [2021-08-06 20:16:51,731 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2912 transitions. Word has length 78 [2021-08-06 20:16:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:51,731 INFO L470 AbstractCegarLoop]: Abstraction has 1444 states and 2912 transitions. [2021-08-06 20:16:51,732 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) [2021-08-06 20:16:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2912 transitions. [2021-08-06 20:16:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-06 20:16:51,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:51,733 INFO L512 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:51,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 20:16:51,933 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 [2021-08-06 20:16:51,933 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash 803301012, now seen corresponding path program 62 times [2021-08-06 20:16:51,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:51,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598421906] [2021-08-06 20:16:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:51,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:55,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:55,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598421906] [2021-08-06 20:16:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598421906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:55,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916977300] [2021-08-06 20:16:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:55,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:55,233 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) [2021-08-06 20:16:55,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:16:56,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:56,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-08-06 20:16:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:57,599 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 [2021-08-06 20:16:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:57,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916977300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:57,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:57,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-08-06 20:16:57,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929156433] [2021-08-06 20:16:57,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-06 20:16:57,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-06 20:16:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 20:16:57,625 INFO L87 Difference]: Start difference. First operand 1444 states and 2912 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) [2021-08-06 20:17:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:07,573 INFO L93 Difference]: Finished difference Result 2919 states and 5614 transitions. [2021-08-06 20:17:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:17:07,574 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 [2021-08-06 20:17:07,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:07,599 INFO L225 Difference]: With dead ends: 2919 [2021-08-06 20:17:07,599 INFO L226 Difference]: Without dead ends: 2076 [2021-08-06 20:17:07,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 10605.1ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-08-06 20:17:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-08-06 20:17:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 152. [2021-08-06 20:17:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.9602649006622517) internal successors, (296), 151 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) [2021-08-06 20:17:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 296 transitions. [2021-08-06 20:17:07,619 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 296 transitions. Word has length 79 [2021-08-06 20:17:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:07,619 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 296 transitions. [2021-08-06 20:17:07,619 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) [2021-08-06 20:17:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 296 transitions. [2021-08-06 20:17:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 20:17:07,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:07,620 INFO L512 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:07,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:07,820 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 [2021-08-06 20:17:07,821 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:17:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash -844394173, now seen corresponding path program 63 times [2021-08-06 20:17:07,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:07,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673558955] [2021-08-06 20:17:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:07,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:08,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:08,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673558955] [2021-08-06 20:17:08,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673558955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:08,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141962204] [2021-08-06 20:17:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:17:08,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:08,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:08,728 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) [2021-08-06 20:17:08,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:17:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-06 20:17:10,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-06 20:17:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:10,983 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:17:10,984 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:17:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:11,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141962204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:11,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:11,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-08-06 20:17:11,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85383323] [2021-08-06 20:17:11,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:17:11,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:17:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:17:11,006 INFO L87 Difference]: Start difference. First operand 152 states and 296 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) [2021-08-06 20:17:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:11,143 INFO L93 Difference]: Finished difference Result 1737 states and 3282 transitions. [2021-08-06 20:17:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:17:11,144 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 [2021-08-06 20:17:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:11,146 INFO L225 Difference]: With dead ends: 1737 [2021-08-06 20:17:11,146 INFO L226 Difference]: Without dead ends: 1701 [2021-08-06 20:17:11,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:17:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-08-06 20:17:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1521. [2021-08-06 20:17:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.017763157894737) internal successors, (3067), 1520 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 3067 transitions. [2021-08-06 20:17:11,160 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 3067 transitions. Word has length 80 [2021-08-06 20:17:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:11,160 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 3067 transitions. [2021-08-06 20:17:11,160 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) [2021-08-06 20:17:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 3067 transitions. [2021-08-06 20:17:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-06 20:17:11,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:11,162 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:11,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 20:17:11,375 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 [2021-08-06 20:17:11,375 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:17:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2043237340, now seen corresponding path program 64 times [2021-08-06 20:17:11,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:11,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620777484] [2021-08-06 20:17:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:11,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:14,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:14,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620777484] [2021-08-06 20:17:14,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620777484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:14,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128296962] [2021-08-06 20:17:14,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:17:14,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:14,655 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) [2021-08-06 20:17:14,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:17:16,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:17:16,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-08-06 20:17:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:17,160 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 [2021-08-06 20:17:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:17,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128296962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:17,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:17,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-08-06 20:17:17,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812697859] [2021-08-06 20:17:17,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-06 20:17:17,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:17,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-06 20:17:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:17:17,187 INFO L87 Difference]: Start difference. First operand 1521 states and 3067 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) [2021-08-06 20:17:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:26,527 INFO L93 Difference]: Finished difference Result 3074 states and 5918 transitions. [2021-08-06 20:17:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-06 20:17:26,528 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 [2021-08-06 20:17:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:26,530 INFO L225 Difference]: With dead ends: 3074 [2021-08-06 20:17:26,530 INFO L226 Difference]: Without dead ends: 2189 [2021-08-06 20:17:26,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 10067.9ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-08-06 20:17:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-08-06 20:17:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 156. [2021-08-06 20:17:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.961290322580645) internal successors, (304), 155 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 304 transitions. [2021-08-06 20:17:26,537 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 304 transitions. Word has length 81 [2021-08-06 20:17:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:26,538 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 304 transitions. [2021-08-06 20:17:26,538 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) [2021-08-06 20:17:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 304 transitions. [2021-08-06 20:17:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-06 20:17:26,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:26,538 INFO L512 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:26,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 20:17:26,738 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 [2021-08-06 20:17:26,739 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:17:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1107230131, now seen corresponding path program 65 times [2021-08-06 20:17:26,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:26,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830264640] [2021-08-06 20:17:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:26,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:27,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:27,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830264640] [2021-08-06 20:17:27,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830264640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:27,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994598010] [2021-08-06 20:17:27,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:17:27,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:27,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:27,533 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) [2021-08-06 20:17:27,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:17:29,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-06 20:17:29,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:29,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-06 20:17:29,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:29,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:17:29,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:17:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:29,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994598010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:29,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:29,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-08-06 20:17:29,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110918986] [2021-08-06 20:17:29,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 20:17:29,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 20:17:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:17:29,615 INFO L87 Difference]: Start difference. First operand 156 states and 304 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) [2021-08-06 20:17:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:29,765 INFO L93 Difference]: Finished difference Result 1822 states and 3447 transitions. [2021-08-06 20:17:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:17:29,766 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 [2021-08-06 20:17:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:29,767 INFO L225 Difference]: With dead ends: 1822 [2021-08-06 20:17:29,768 INFO L226 Difference]: Without dead ends: 1785 [2021-08-06 20:17:29,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:17:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-06 20:17:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1600. [2021-08-06 20:17:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.017510944340213) internal successors, (3226), 1599 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3226 transitions. [2021-08-06 20:17:29,781 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3226 transitions. Word has length 82 [2021-08-06 20:17:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:29,781 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 3226 transitions. [2021-08-06 20:17:29,781 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) [2021-08-06 20:17:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3226 transitions. [2021-08-06 20:17:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-06 20:17:29,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:29,783 INFO L512 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:29,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:29,983 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 [2021-08-06 20:17:29,983 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:17:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash 70181972, now seen corresponding path program 66 times [2021-08-06 20:17:29,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:29,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731423202] [2021-08-06 20:17:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:29,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:32,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:32,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731423202] [2021-08-06 20:17:32,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731423202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:32,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372551715] [2021-08-06 20:17:32,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:17:32,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:32,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:32,988 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) [2021-08-06 20:17:32,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:17:34,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-06 20:17:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:34,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-06 20:17:34,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:42,896 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:17:42,896 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 [2021-08-06 20:17:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 666 proven. 740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:42,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372551715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:42,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:42,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 150 [2021-08-06 20:17:42,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288962401] [2021-08-06 20:17:42,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-08-06 20:17:42,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:42,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-08-06 20:17:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3000, Invalid=19650, Unknown=0, NotChecked=0, Total=22650 [2021-08-06 20:17:42,922 INFO L87 Difference]: Start difference. First operand 1600 states and 3226 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) [2021-08-06 20:21:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:21:41,832 INFO L93 Difference]: Finished difference Result 25546 states and 48485 transitions. [2021-08-06 20:21:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 855 states. [2021-08-06 20:21:41,833 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 [2021-08-06 20:21:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:21:41,863 INFO L225 Difference]: With dead ends: 25546 [2021-08-06 20:21:41,863 INFO L226 Difference]: Without dead ends: 20918 [2021-08-06 20:21:41,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 964 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356620 ImplicationChecksByTransitivity, 229225.0ms TimeCoverageRelationStatistics Valid=157219, Invalid=774971, Unknown=0, NotChecked=0, Total=932190 [2021-08-06 20:21:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20918 states. [2021-08-06 20:21:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20918 to 1641. [2021-08-06 20:21:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 2.018292682926829) internal successors, (3310), 1640 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:21:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 3310 transitions. [2021-08-06 20:21:42,026 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 3310 transitions. Word has length 83 [2021-08-06 20:21:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:21:42,026 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 3310 transitions. [2021-08-06 20:21:42,026 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) [2021-08-06 20:21:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 3310 transitions. [2021-08-06 20:21:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-06 20:21:42,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:21:42,028 INFO L512 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:21:42,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:21:42,252 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 [2021-08-06 20:21:42,253 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:21:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:21:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2027851236, now seen corresponding path program 67 times [2021-08-06 20:21:42,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:21:42,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917494478] [2021-08-06 20:21:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:21:42,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:21:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:21:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:21:45,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:21:45,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917494478] [2021-08-06 20:21:45,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917494478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:21:45,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022030477] [2021-08-06 20:21:45,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:21:45,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:21:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:21:45,549 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) [2021-08-06 20:21:45,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:21:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:21:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-08-06 20:21:47,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:21:48,288 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 [2021-08-06 20:21:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:21:48,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022030477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:21:48,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:21:48,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-08-06 20:21:48,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283223010] [2021-08-06 20:21:48,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-06 20:21:48,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:21:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-06 20:21:48,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:21:48,323 INFO L87 Difference]: Start difference. First operand 1641 states and 3310 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) [2021-08-06 20:21:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:21:59,537 INFO L93 Difference]: Finished difference Result 3353 states and 6469 transitions. [2021-08-06 20:21:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 20:21:59,537 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 [2021-08-06 20:21:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:21:59,541 INFO L225 Difference]: With dead ends: 3353 [2021-08-06 20:21:59,541 INFO L226 Difference]: Without dead ends: 2422 [2021-08-06 20:21:59,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 11660.4ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-08-06 20:21:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-08-06 20:21:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 164. [2021-08-06 20:21:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.9631901840490797) internal successors, (320), 163 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:21:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 320 transitions. [2021-08-06 20:21:59,552 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 320 transitions. Word has length 85 [2021-08-06 20:21:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:21:59,552 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 320 transitions. [2021-08-06 20:21:59,552 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) [2021-08-06 20:21:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 320 transitions. [2021-08-06 20:21:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-06 20:21:59,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:21:59,553 INFO L512 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:21:59,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 20:21:59,760 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 [2021-08-06 20:21:59,761 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:21:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:21:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1538042893, now seen corresponding path program 68 times [2021-08-06 20:21:59,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:21:59,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857666706] [2021-08-06 20:21:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:21:59,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:21:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:22:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:00,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:22:00,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857666706] [2021-08-06 20:22:00,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857666706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:00,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032137210] [2021-08-06 20:22:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:22:00,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:22:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:22:00,601 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) [2021-08-06 20:22:00,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:22:02,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:22:02,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:22:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-06 20:22:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:22:02,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:22:02,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:22:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:02,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032137210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:02,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:22:02,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-08-06 20:22:02,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787848106] [2021-08-06 20:22:02,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 20:22:02,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:22:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 20:22:02,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:22:02,893 INFO L87 Difference]: Start difference. First operand 164 states and 320 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) [2021-08-06 20:22:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:22:03,058 INFO L93 Difference]: Finished difference Result 1998 states and 3789 transitions. [2021-08-06 20:22:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:22:03,059 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 [2021-08-06 20:22:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:22:03,061 INFO L225 Difference]: With dead ends: 1998 [2021-08-06 20:22:03,061 INFO L226 Difference]: Without dead ends: 1959 [2021-08-06 20:22:03,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:22:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-06 20:22:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1764. [2021-08-06 20:22:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 2.01701644923426) internal successors, (3556), 1763 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:22:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 3556 transitions. [2021-08-06 20:22:03,084 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 3556 transitions. Word has length 86 [2021-08-06 20:22:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:22:03,084 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 3556 transitions. [2021-08-06 20:22:03,084 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) [2021-08-06 20:22:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 3556 transitions. [2021-08-06 20:22:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-06 20:22:03,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:22:03,086 INFO L512 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:22:03,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 20:22:03,301 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 [2021-08-06 20:22:03,302 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:22:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:22:03,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1761411604, now seen corresponding path program 69 times [2021-08-06 20:22:03,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:22:03,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274589779] [2021-08-06 20:22:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:22:03,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:22:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:22:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:06,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:22:06,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274589779] [2021-08-06 20:22:06,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274589779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:06,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241806808] [2021-08-06 20:22:06,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:22:06,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:22:06,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:22:06,500 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) [2021-08-06 20:22:06,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:22:08,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-06 20:22:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:22:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 159 conjunts are in the unsatisfiable core [2021-08-06 20:22:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:22:09,030 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 [2021-08-06 20:22:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:09,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241806808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:09,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:22:09,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2021-08-06 20:22:09,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990277012] [2021-08-06 20:22:09,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-06 20:22:09,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:22:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-06 20:22:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:22:09,053 INFO L87 Difference]: Start difference. First operand 1764 states and 3556 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) [2021-08-06 20:22:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:22:19,915 INFO L93 Difference]: Finished difference Result 3563 states and 6878 transitions. [2021-08-06 20:22:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-06 20:22:19,915 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 [2021-08-06 20:22:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:22:19,918 INFO L225 Difference]: With dead ends: 3563 [2021-08-06 20:22:19,918 INFO L226 Difference]: Without dead ends: 2546 [2021-08-06 20:22:19,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 11297.7ms TimeCoverageRelationStatistics Valid=3435, Invalid=21687, Unknown=0, NotChecked=0, Total=25122 [2021-08-06 20:22:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-08-06 20:22:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 168. [2021-08-06 20:22:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.964071856287425) internal successors, (328), 167 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:22:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 328 transitions. [2021-08-06 20:22:19,927 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 328 transitions. Word has length 87 [2021-08-06 20:22:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:22:19,927 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 328 transitions. [2021-08-06 20:22:19,927 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) [2021-08-06 20:22:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 328 transitions. [2021-08-06 20:22:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-06 20:22:19,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:22:19,928 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:22:19,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 20:22:20,132 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 [2021-08-06 20:22:20,133 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:22:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:22:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1207736893, now seen corresponding path program 70 times [2021-08-06 20:22:20,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:22:20,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723178172] [2021-08-06 20:22:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:22:20,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:22:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:22:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:21,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:22:21,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723178172] [2021-08-06 20:22:21,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723178172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:21,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246277286] [2021-08-06 20:22:21,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:22:21,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:22:21,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:22:21,034 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) [2021-08-06 20:22:21,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:22:22,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:22:22,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:22:22,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-06 20:22:22,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:22:23,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:22:23,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:22:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:23,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246277286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:23,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:22:23,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 42 [2021-08-06 20:22:23,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784533213] [2021-08-06 20:22:23,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:22:23,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:22:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:22:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:22:23,319 INFO L87 Difference]: Start difference. First operand 168 states and 328 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) [2021-08-06 20:22:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:22:23,472 INFO L93 Difference]: Finished difference Result 2089 states and 3966 transitions. [2021-08-06 20:22:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:22:23,473 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 [2021-08-06 20:22:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:22:23,475 INFO L225 Difference]: With dead ends: 2089 [2021-08-06 20:22:23,475 INFO L226 Difference]: Without dead ends: 2049 [2021-08-06 20:22:23,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:22:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-08-06 20:22:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1849. [2021-08-06 20:22:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 2.0167748917748916) internal successors, (3727), 1848 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:22:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 3727 transitions. [2021-08-06 20:22:23,490 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 3727 transitions. Word has length 88 [2021-08-06 20:22:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:22:23,490 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 3727 transitions. [2021-08-06 20:22:23,490 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) [2021-08-06 20:22:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 3727 transitions. [2021-08-06 20:22:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-06 20:22:23,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:22:23,492 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:22:23,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:22:23,696 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 [2021-08-06 20:22:23,697 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:22:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:22:23,697 INFO L82 PathProgramCache]: Analyzing trace with hash -117829724, now seen corresponding path program 71 times [2021-08-06 20:22:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:22:23,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074296431] [2021-08-06 20:22:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:22:23,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:22:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:22:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:27,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:22:27,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074296431] [2021-08-06 20:22:27,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074296431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:27,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143038330] [2021-08-06 20:22:27,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:22:27,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:22:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:22:27,030 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) [2021-08-06 20:22:27,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:22:28,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-06 20:22:28,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:22:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-06 20:22:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:22:36,953 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 20:22:36,953 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 [2021-08-06 20:22:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 780 proven. 860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:22:36,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143038330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:22:36,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:22:36,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 162 [2021-08-06 20:22:36,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024025784] [2021-08-06 20:22:36,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-08-06 20:22:36,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:22:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-08-06 20:22:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3483, Invalid=22923, Unknown=0, NotChecked=0, Total=26406 [2021-08-06 20:22:36,977 INFO L87 Difference]: Start difference. First operand 1849 states and 3727 transitions. Second operand has 163 states, 163 states have (on average 1.0613496932515338) internal successors, (173), 162 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 20:24:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 449 states. [2021-08-06 20:24:02,025 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:24:02,041 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:24:02,041 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:24:02,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 20:24:02,228 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 [2021-08-06 20:24:02,229 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1849states) and FLOYD_HOARE automaton (currently 449 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 610 known predicates. [2021-08-06 20:24:02,230 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:24:02,230 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:24:02,233 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:24:02,234 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:24:02,235 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:24:02 BasicIcfg [2021-08-06 20:24:02,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:24:02,236 INFO L168 Benchmark]: Toolchain (without parser) took 795347.65 ms. Allocated memory was 163.6 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 143.7 MB in the beginning and 947.9 MB in the end (delta: -804.1 MB). Peak memory consumption was 517.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:24:02,236 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 163.6 MB. Free memory is still 144.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:24:02,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.63 ms. Allocated memory is still 163.6 MB. Free memory was 143.6 MB in the beginning and 142.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:24:02,236 INFO L168 Benchmark]: Boogie Preprocessor took 16.09 ms. Allocated memory is still 163.6 MB. Free memory was 142.2 MB in the beginning and 141.3 MB in the end (delta: 935.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:24:02,236 INFO L168 Benchmark]: RCFGBuilder took 546.32 ms. Allocated memory is still 163.6 MB. Free memory was 141.2 MB in the beginning and 130.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 20:24:02,236 INFO L168 Benchmark]: TraceAbstraction took 794743.87 ms. Allocated memory was 163.6 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 129.6 MB in the beginning and 947.9 MB in the end (delta: -818.3 MB). Peak memory consumption was 503.4 MB. Max. memory is 8.0 GB. [2021-08-06 20:24:02,237 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 0.17 ms. Allocated memory is still 163.6 MB. Free memory is still 144.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 31.63 ms. Allocated memory is still 163.6 MB. Free memory was 143.6 MB in the beginning and 142.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.09 ms. Allocated memory is still 163.6 MB. Free memory was 142.2 MB in the beginning and 141.3 MB in the end (delta: 935.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 546.32 ms. Allocated memory is still 163.6 MB. Free memory was 141.2 MB in the beginning and 130.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 794743.87 ms. Allocated memory was 163.6 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 129.6 MB in the beginning and 947.9 MB in the end (delta: -818.3 MB). Peak memory consumption was 503.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 12, positive: 8, positive conditional: 8, positive unconditional: 0, negative: 4, negative conditional: 4, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 8, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 8, unknown conditional: 0, unknown unconditional: 8] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 4 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1849states) and FLOYD_HOARE automaton (currently 449 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 610 known predicates. - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1849states) and FLOYD_HOARE automaton (currently 449 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 610 known predicates. - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1849states) and FLOYD_HOARE automaton (currently 449 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 610 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 794531.8ms, OverallIterations: 73, TraceHistogramMax: 40, EmptinessCheckTime: 87.1ms, AutomataDifference: 592793.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 132.7ms, PartialOrderReductionTime: 98.2ms, HoareTripleCheckerStatistics: 7390 SDtfs, 72428 SDslu, 253395 SDs, 0 SdLazy, 70340 SolverSat, 30320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41017.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10366 GetRequests, 3778 SyntacticMatches, 61 SemanticMatches, 6526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703054 ImplicationChecksByTransitivity, 606059.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=72, InterpolantAutomatonStates: 4321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 883.5ms AutomataMinimizationTime, 72 MinimizatonAttempts, 65841 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 554.0ms SsaConstructionTime, 3155.9ms SatisfiabilityAnalysisTime, 127144.3ms InterpolantComputationTime, 7195 NumberOfCodeBlocks, 7195 NumberOfCodeBlocksAsserted, 538 NumberOfCheckSat, 7051 ConstructedInterpolants, 143 QuantifiedInterpolants, 46249 SizeOfPredicates, 54 NumberOfNonLiveVariables, 14848 ConjunctsInSsa, 4446 ConjunctsInUnsatCore, 144 InterpolantComputations, 2 PerfectInterpolantSequences, 21525/83065 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown