/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/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:42:28,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:42:28,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:42:28,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:42:28,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:42:28,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:42:28,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:42:28,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:42:28,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:42:28,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:42:28,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:42:28,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:42:28,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:42:28,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:42:28,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:42:28,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:42:28,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:42:28,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:42:28,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:42:28,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:42:28,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:42:28,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:42:28,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:42:28,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:42:28,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 17:42:28,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 17:42:28,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 17:42:28,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 17:42:28,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 17:42:28,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 17:42:28,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 17:42:28,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 17:42:28,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 17:42:28,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 17:42:28,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 17:42:28,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 17:42:28,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 17:42:28,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 17:42:28,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:42:28,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:42:28,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:42:28,792 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 [2021-08-21 17:42:28,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:42:28,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:42:28,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:42:28,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:42:28,833 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:42:28,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:42:28,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:42:28,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:42:28,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:42:28,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:42:28,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:42:28,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:42:28,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:42:28,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:42:28,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:42:28,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:42:28,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:42:28,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:42:28,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:42:28,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:42:28,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:42:28,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:42:28,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:42:28,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:42:28,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:42:28,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:42:28,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:42:28,837 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:42:28,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:42:28,838 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:42:28,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:42:29,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:42:29,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:42:29,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:42:29,167 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:42:29,168 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:42:29,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-08-21 17:42:29,169 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-08-21 17:42:29,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:42:29,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:42:29,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:42:29,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:42:29,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:42:29,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:42:29,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:42:29,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:42:29,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:42:29,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:42:29,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:42:29,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:42:29,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:42:29,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/1) ... [2021-08-21 17:42:29,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:42:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:29,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 17:42:29,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 17:42:29,314 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:42:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:42:29,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:42:29,314 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:42:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:42:29,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:42:29,315 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:42:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:42:29,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:42:29,316 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 17:42:29,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:42:29,517 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 17:42:29,518 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 17:42:29,519 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:42:29 BoogieIcfgContainer [2021-08-21 17:42:29,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:42:29,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:42:29,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:42:29,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:42:29,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:42:29" (1/2) ... [2021-08-21 17:42:29,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67606693 and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:42:29, skipping insertion in model container [2021-08-21 17:42:29,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:42:29" (2/2) ... [2021-08-21 17:42:29,525 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-08-21 17:42:29,529 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:42:29,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:42:29,529 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:42:29,530 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:42:29,552 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:42:29,586 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:42:29,591 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 17:42:29,592 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:42:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 17:42:29,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:29,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:29,699 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:29,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:29,704 INFO L82 PathProgramCache]: Analyzing trace with hash 519320593, now seen corresponding path program 1 times [2021-08-21 17:42:29,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:29,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166877792] [2021-08-21 17:42:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:29,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:29,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:29,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166877792] [2021-08-21 17:42:29,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166877792] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:42:29,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:42:29,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:42:29,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247100736] [2021-08-21 17:42:29,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:42:29,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:42:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:42:29,903 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 15 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) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:29,939 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-08-21 17:42:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:42:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 17:42:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:29,947 INFO L225 Difference]: With dead ends: 26 [2021-08-21 17:42:29,948 INFO L226 Difference]: Without dead ends: 13 [2021-08-21 17:42:29,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:42:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-21 17:42:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-21 17:42:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2021-08-21 17:42:29,974 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 10 [2021-08-21 17:42:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:29,974 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-08-21 17:42:29,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2021-08-21 17:42:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:42:29,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:29,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:29,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:42:29,976 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1175011406, now seen corresponding path program 1 times [2021-08-21 17:42:29,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:29,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286314776] [2021-08-21 17:42:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:29,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:30,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:30,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286314776] [2021-08-21 17:42:30,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286314776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:30,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769614680] [2021-08-21 17:42:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:30,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:30,176 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:30,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 17:42:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:42:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:30,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 17:42:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:30,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769614680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:30,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:30,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 17:42:30,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252966355] [2021-08-21 17:42:30,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:30,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:30,529 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:30,593 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-08-21 17:42:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:42:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 11 [2021-08-21 17:42:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:30,594 INFO L225 Difference]: With dead ends: 20 [2021-08-21 17:42:30,595 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 17:42:30,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:42:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 17:42:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-21 17:42:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2021-08-21 17:42:30,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 11 [2021-08-21 17:42:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:30,604 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-08-21 17:42:30,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2021-08-21 17:42:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:42:30,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:30,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:30,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:30,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:30,830 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1984358032, now seen corresponding path program 1 times [2021-08-21 17:42:30,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:30,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140220116] [2021-08-21 17:42:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:30,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:30,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:30,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140220116] [2021-08-21 17:42:30,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140220116] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:42:30,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:42:30,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:42:30,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783496067] [2021-08-21 17:42:30,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:42:30,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:42:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:42:30,863 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:30,879 INFO L93 Difference]: Finished difference Result 16 states and 24 transitions. [2021-08-21 17:42:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:42:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:42:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:30,880 INFO L225 Difference]: With dead ends: 16 [2021-08-21 17:42:30,880 INFO L226 Difference]: Without dead ends: 16 [2021-08-21 17:42:30,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:42:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-21 17:42:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-21 17:42:30,883 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) [2021-08-21 17:42:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2021-08-21 17:42:30,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 11 [2021-08-21 17:42:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:30,884 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2021-08-21 17:42:30,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2021-08-21 17:42:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:42:30,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:30,885 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:30,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:42:30,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:30,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2135271473, now seen corresponding path program 2 times [2021-08-21 17:42:30,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:30,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156949993] [2021-08-21 17:42:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:30,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:31,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:31,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156949993] [2021-08-21 17:42:31,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156949993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:31,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798591868] [2021-08-21 17:42:31,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:31,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:31,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:31,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 17:42:31,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:31,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:42:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:31,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:31,255 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 52 [2021-08-21 17:42:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:31,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798591868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:31,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:31,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 17:42:31,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014771366] [2021-08-21 17:42:31,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:31,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:31,308 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:31,368 INFO L93 Difference]: Finished difference Result 23 states and 34 transitions. [2021-08-21 17:42:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:42:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 12 [2021-08-21 17:42:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:31,370 INFO L225 Difference]: With dead ends: 23 [2021-08-21 17:42:31,370 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 17:42:31,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:42:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 17:42:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 17:42:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2021-08-21 17:42:31,376 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 12 [2021-08-21 17:42:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:31,377 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2021-08-21 17:42:31,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2021-08-21 17:42:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:42:31,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:31,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:31,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:31,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 17:42:31,608 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:31,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1325924847, now seen corresponding path program 1 times [2021-08-21 17:42:31,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:31,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712443447] [2021-08-21 17:42:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:31,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:31,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:31,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712443447] [2021-08-21 17:42:31,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712443447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:31,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312989828] [2021-08-21 17:42:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:31,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:31,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:31,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 17:42:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:42:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:31,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312989828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:31,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:31,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 17:42:31,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789666353] [2021-08-21 17:42:31,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:42:31,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:31,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:42:31,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:42:31,751 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-08-21 17:42:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:31,792 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-08-21 17:42:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:42:31,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:42:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:31,793 INFO L225 Difference]: With dead ends: 35 [2021-08-21 17:42:31,793 INFO L226 Difference]: Without dead ends: 35 [2021-08-21 17:42:31,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:42:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-21 17:42:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-08-21 17:42:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 33 transitions. [2021-08-21 17:42:31,801 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 33 transitions. Word has length 12 [2021-08-21 17:42:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:31,802 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 33 transitions. [2021-08-21 17:42:31,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-08-21 17:42:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 33 transitions. [2021-08-21 17:42:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:42:31,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:31,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:31,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:32,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:32,017 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1479637453, now seen corresponding path program 2 times [2021-08-21 17:42:32,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:32,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522477765] [2021-08-21 17:42:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:32,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:32,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:32,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522477765] [2021-08-21 17:42:32,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522477765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:32,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977195520] [2021-08-21 17:42:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:32,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:32,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:32,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 17:42:32,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:32,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:32,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:42:32,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:32,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977195520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:32,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:32,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 17:42:32,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453074306] [2021-08-21 17:42:32,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:42:32,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:32,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:42:32,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:42:32,189 INFO L87 Difference]: Start difference. First operand 20 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-08-21 17:42:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:32,220 INFO L93 Difference]: Finished difference Result 23 states and 39 transitions. [2021-08-21 17:42:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:42:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:42:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:32,221 INFO L225 Difference]: With dead ends: 23 [2021-08-21 17:42:32,221 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 17:42:32,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:42:32,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 17:42:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-08-21 17:42:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 37 transitions. [2021-08-21 17:42:32,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 37 transitions. Word has length 12 [2021-08-21 17:42:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:32,229 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 37 transitions. [2021-08-21 17:42:32,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-08-21 17:42:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 37 transitions. [2021-08-21 17:42:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:42:32,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:32,229 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:32,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:32,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:32,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1700440970, now seen corresponding path program 3 times [2021-08-21 17:42:32,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:32,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816873325] [2021-08-21 17:42:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:32,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:32,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:32,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816873325] [2021-08-21 17:42:32,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816873325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:32,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091743616] [2021-08-21 17:42:32,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:32,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:32,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:32,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:32,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 17:42:32,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:42:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:32,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:42:32,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:32,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091743616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:32,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:32,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:42:32,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583548855] [2021-08-21 17:42:32,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:42:32,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:42:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:42:32,628 INFO L87 Difference]: Start difference. First operand 22 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:32,688 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-08-21 17:42:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:42:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-08-21 17:42:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:32,691 INFO L225 Difference]: With dead ends: 46 [2021-08-21 17:42:32,692 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 17:42:32,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:42:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 17:42:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 25. [2021-08-21 17:42:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 45 transitions. [2021-08-21 17:42:32,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 45 transitions. Word has length 13 [2021-08-21 17:42:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:32,703 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 45 transitions. [2021-08-21 17:42:32,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 45 transitions. [2021-08-21 17:42:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:42:32,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:32,704 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:32,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:32,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:32,917 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1674825618, now seen corresponding path program 3 times [2021-08-21 17:42:32,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:32,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480647738] [2021-08-21 17:42:32,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:32,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:32,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:32,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480647738] [2021-08-21 17:42:32,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480647738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:32,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42685928] [2021-08-21 17:42:32,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:32,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:32,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:32,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 17:42:33,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:42:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:42:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:33,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42685928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:33,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:33,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:42:33,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299499677] [2021-08-21 17:42:33,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:42:33,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:42:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:42:33,092 INFO L87 Difference]: Start difference. First operand 25 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:33,134 INFO L93 Difference]: Finished difference Result 27 states and 49 transitions. [2021-08-21 17:42:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:42:33,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-08-21 17:42:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:33,138 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:42:33,138 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:42:33,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:42:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:42:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-21 17:42:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-08-21 17:42:33,143 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 13 [2021-08-21 17:42:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:33,143 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-08-21 17:42:33,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-08-21 17:42:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:42:33,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:33,144 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:33,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:33,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:33,357 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash 865478992, now seen corresponding path program 4 times [2021-08-21 17:42:33,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:33,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453425707] [2021-08-21 17:42:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:33,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:33,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:33,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453425707] [2021-08-21 17:42:33,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453425707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:33,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690723047] [2021-08-21 17:42:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:33,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:33,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:33,392 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:33,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 17:42:33,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:33,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:42:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690723047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:33,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:33,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:42:33,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411625927] [2021-08-21 17:42:33,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:42:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:42:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:42:33,522 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:33,551 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2021-08-21 17:42:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:42:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-08-21 17:42:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:33,552 INFO L225 Difference]: With dead ends: 40 [2021-08-21 17:42:33,552 INFO L226 Difference]: Without dead ends: 40 [2021-08-21 17:42:33,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:42:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-21 17:42:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-08-21 17:42:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 43 transitions. [2021-08-21 17:42:33,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 43 transitions. Word has length 13 [2021-08-21 17:42:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:33,555 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 43 transitions. [2021-08-21 17:42:33,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 43 transitions. [2021-08-21 17:42:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:42:33,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:33,556 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:33,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:33,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:33,774 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:33,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1940083308, now seen corresponding path program 5 times [2021-08-21 17:42:33,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:33,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913899151] [2021-08-21 17:42:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:33,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:33,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:33,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913899151] [2021-08-21 17:42:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913899151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:33,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215348901] [2021-08-21 17:42:33,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:42:33,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:33,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:33,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 17:42:33,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:33,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:42:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:33,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215348901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:33,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:33,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:42:33,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536072178] [2021-08-21 17:42:33,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:42:33,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:42:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:42:33,931 INFO L87 Difference]: Start difference. First operand 25 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:33,962 INFO L93 Difference]: Finished difference Result 27 states and 47 transitions. [2021-08-21 17:42:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:42:33,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-08-21 17:42:33,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:33,963 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:42:33,963 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:42:33,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:42:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-08-21 17:42:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 43 transitions. [2021-08-21 17:42:33,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 43 transitions. Word has length 13 [2021-08-21 17:42:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:33,966 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 43 transitions. [2021-08-21 17:42:33,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 43 transitions. [2021-08-21 17:42:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:42:33,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:33,966 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:33,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:34,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 17:42:34,190 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1281798608, now seen corresponding path program 6 times [2021-08-21 17:42:34,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:34,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907143527] [2021-08-21 17:42:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:34,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:34,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:34,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907143527] [2021-08-21 17:42:34,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907143527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:34,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991668849] [2021-08-21 17:42:34,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:42:34,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:34,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:34,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:34,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 17:42:34,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:42:34,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:34,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:42:34,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991668849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:34,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:34,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:42:34,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046208591] [2021-08-21 17:42:34,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:42:34,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:34,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:42:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:42:34,347 INFO L87 Difference]: Start difference. First operand 25 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:34,385 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-08-21 17:42:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:42:34,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-08-21 17:42:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:34,386 INFO L225 Difference]: With dead ends: 32 [2021-08-21 17:42:34,386 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 17:42:34,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:42:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 17:42:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-08-21 17:42:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 49 transitions. [2021-08-21 17:42:34,388 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 49 transitions. Word has length 13 [2021-08-21 17:42:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:34,388 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 49 transitions. [2021-08-21 17:42:34,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 49 transitions. [2021-08-21 17:42:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:42:34,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:34,389 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:34,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:34,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:34,593 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1205606709, now seen corresponding path program 7 times [2021-08-21 17:42:34,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:34,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932176504] [2021-08-21 17:42:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:34,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:34,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:34,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932176504] [2021-08-21 17:42:34,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932176504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:34,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724879464] [2021-08-21 17:42:34,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:34,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:34,717 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:34,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 17:42:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:34,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:42:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:35,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:35,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 17:42:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:35,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724879464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:35,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:35,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 17:42:35,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456062022] [2021-08-21 17:42:35,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:42:35,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:42:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:42:35,377 INFO L87 Difference]: Start difference. First operand 28 states and 49 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:35,485 INFO L93 Difference]: Finished difference Result 38 states and 64 transitions. [2021-08-21 17:42:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:42:35,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 14 [2021-08-21 17:42:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:35,486 INFO L225 Difference]: With dead ends: 38 [2021-08-21 17:42:35,486 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 17:42:35,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 17:42:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-08-21 17:42:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 53 transitions. [2021-08-21 17:42:35,489 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 53 transitions. Word has length 14 [2021-08-21 17:42:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:35,489 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 53 transitions. [2021-08-21 17:42:35,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 53 transitions. [2021-08-21 17:42:35,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:42:35,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:35,490 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:35,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:35,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 17:42:35,701 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:35,701 INFO L82 PathProgramCache]: Analyzing trace with hash -523440625, now seen corresponding path program 8 times [2021-08-21 17:42:35,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:35,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986977549] [2021-08-21 17:42:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:35,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:35,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986977549] [2021-08-21 17:42:35,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986977549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706908930] [2021-08-21 17:42:35,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:35,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:35,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:35,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 17:42:35,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:42:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:36,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:36,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 17:42:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:36,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706908930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:36,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:36,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 17:42:36,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919951412] [2021-08-21 17:42:36,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:42:36,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:42:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:42:36,369 INFO L87 Difference]: Start difference. First operand 30 states and 53 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:36,487 INFO L93 Difference]: Finished difference Result 49 states and 84 transitions. [2021-08-21 17:42:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 14 [2021-08-21 17:42:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:36,490 INFO L225 Difference]: With dead ends: 49 [2021-08-21 17:42:36,490 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 17:42:36,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:42:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 17:42:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-08-21 17:42:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 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) [2021-08-21 17:42:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 64 transitions. [2021-08-21 17:42:36,495 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 64 transitions. Word has length 14 [2021-08-21 17:42:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:36,496 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 64 transitions. [2021-08-21 17:42:36,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 64 transitions. [2021-08-21 17:42:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:42:36,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:36,496 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:36,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:36,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 17:42:36,717 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash 965964371, now seen corresponding path program 9 times [2021-08-21 17:42:36,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:36,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087574132] [2021-08-21 17:42:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:36,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:36,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:36,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087574132] [2021-08-21 17:42:36,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087574132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:36,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104079271] [2021-08-21 17:42:36,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:36,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:36,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:36,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 17:42:36,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:42:36,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:42:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:37,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:37,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 17:42:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:37,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104079271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:37,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:37,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 17:42:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104328601] [2021-08-21 17:42:37,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:42:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:42:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:42:37,298 INFO L87 Difference]: Start difference. First operand 34 states and 64 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:37,475 INFO L93 Difference]: Finished difference Result 55 states and 99 transitions. [2021-08-21 17:42:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:37,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 14 [2021-08-21 17:42:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:37,476 INFO L225 Difference]: With dead ends: 55 [2021-08-21 17:42:37,476 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 17:42:37,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:42:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 17:42:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-08-21 17:42:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 82 transitions. [2021-08-21 17:42:37,479 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 82 transitions. Word has length 14 [2021-08-21 17:42:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:37,480 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 82 transitions. [2021-08-21 17:42:37,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 82 transitions. [2021-08-21 17:42:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:42:37,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:37,488 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:37,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:37,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 17:42:37,697 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:37,698 INFO L82 PathProgramCache]: Analyzing trace with hash -107121009, now seen corresponding path program 10 times [2021-08-21 17:42:37,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:37,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202316812] [2021-08-21 17:42:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:37,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:37,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:37,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202316812] [2021-08-21 17:42:37,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202316812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:37,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101001292] [2021-08-21 17:42:37,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:37,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:37,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:37,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:37,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 17:42:37,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:37,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:42:37,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:38,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:38,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 17:42:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:38,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101001292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:38,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:38,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 17:42:38,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657051172] [2021-08-21 17:42:38,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:42:38,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:42:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:42:38,386 INFO L87 Difference]: Start difference. First operand 41 states and 82 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:38,571 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2021-08-21 17:42:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 14 [2021-08-21 17:42:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:38,572 INFO L225 Difference]: With dead ends: 61 [2021-08-21 17:42:38,572 INFO L226 Difference]: Without dead ends: 51 [2021-08-21 17:42:38,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:42:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-21 17:42:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-08-21 17:42:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 99 transitions. [2021-08-21 17:42:38,576 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 99 transitions. Word has length 14 [2021-08-21 17:42:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:38,576 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 99 transitions. [2021-08-21 17:42:38,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 99 transitions. [2021-08-21 17:42:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:42:38,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:38,577 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:38,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:38,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 17:42:38,796 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 986970579, now seen corresponding path program 11 times [2021-08-21 17:42:38,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:38,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231139018] [2021-08-21 17:42:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:38,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:38,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:38,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231139018] [2021-08-21 17:42:38,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231139018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:38,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297139050] [2021-08-21 17:42:38,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:42:38,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:38,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:38,884 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:38,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 17:42:39,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:42:39,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:39,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:42:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:39,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 17:42:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:39,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297139050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:39,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:39,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 17:42:39,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280921516] [2021-08-21 17:42:39,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:42:39,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:39,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:42:39,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:42:39,624 INFO L87 Difference]: Start difference. First operand 48 states and 99 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:39,795 INFO L93 Difference]: Finished difference Result 69 states and 134 transitions. [2021-08-21 17:42:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 14 [2021-08-21 17:42:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:39,795 INFO L225 Difference]: With dead ends: 69 [2021-08-21 17:42:39,795 INFO L226 Difference]: Without dead ends: 59 [2021-08-21 17:42:39,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:42:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-21 17:42:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-08-21 17:42:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 54 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 116 transitions. [2021-08-21 17:42:39,799 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 116 transitions. Word has length 14 [2021-08-21 17:42:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:39,799 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 116 transitions. [2021-08-21 17:42:39,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 116 transitions. [2021-08-21 17:42:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:39,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:39,800 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:39,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:40,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:40,005 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1098771542, now seen corresponding path program 12 times [2021-08-21 17:42:40,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:40,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376592478] [2021-08-21 17:42:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:40,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:40,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:40,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376592478] [2021-08-21 17:42:40,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376592478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:40,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797312307] [2021-08-21 17:42:40,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:42:40,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:40,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:40,137 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:40,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 17:42:40,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:42:40,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:40,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 17:42:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:40,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:40,610 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 17:42:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:40,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797312307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:40,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:40,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:40,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528657604] [2021-08-21 17:42:40,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:40,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:40,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:40,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:40,659 INFO L87 Difference]: Start difference. First operand 55 states and 116 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:40,842 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-08-21 17:42:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:42:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:42:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:40,844 INFO L225 Difference]: With dead ends: 70 [2021-08-21 17:42:40,844 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 17:42:40,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:42:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 17:42:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-08-21 17:42:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 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) [2021-08-21 17:42:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2021-08-21 17:42:40,853 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 15 [2021-08-21 17:42:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:40,853 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2021-08-21 17:42:40,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2021-08-21 17:42:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:40,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:40,854 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:40,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 17:42:41,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 17:42:41,069 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -630275792, now seen corresponding path program 13 times [2021-08-21 17:42:41,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:41,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407766806] [2021-08-21 17:42:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:41,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:41,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:41,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407766806] [2021-08-21 17:42:41,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407766806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:41,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085275011] [2021-08-21 17:42:41,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:41,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:41,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:41,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:41,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 17:42:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:41,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 17:42:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:41,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:41,674 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 17:42:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:41,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085275011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:41,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:41,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:41,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657587514] [2021-08-21 17:42:41,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:41,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:41,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:41,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:41,726 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:41,936 INFO L93 Difference]: Finished difference Result 69 states and 139 transitions. [2021-08-21 17:42:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:42:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:42:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:41,937 INFO L225 Difference]: With dead ends: 69 [2021-08-21 17:42:41,937 INFO L226 Difference]: Without dead ends: 63 [2021-08-21 17:42:41,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:42:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-21 17:42:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-08-21 17:42:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 123 transitions. [2021-08-21 17:42:41,940 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 123 transitions. Word has length 15 [2021-08-21 17:42:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:41,940 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 123 transitions. [2021-08-21 17:42:41,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 123 transitions. [2021-08-21 17:42:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:41,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:41,941 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:41,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:42,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 17:42:42,149 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash 49782578, now seen corresponding path program 14 times [2021-08-21 17:42:42,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:42,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131606662] [2021-08-21 17:42:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:42,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:42,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:42,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131606662] [2021-08-21 17:42:42,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131606662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:42,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828938202] [2021-08-21 17:42:42,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:42,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:42,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:42,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 17:42:42,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:42,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:42:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828938202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:42,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:42,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:42:42,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566388671] [2021-08-21 17:42:42,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:42:42,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:42:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:42:42,423 INFO L87 Difference]: Start difference. First operand 59 states and 123 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:42,474 INFO L93 Difference]: Finished difference Result 102 states and 177 transitions. [2021-08-21 17:42:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:42:42,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 15 [2021-08-21 17:42:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:42,475 INFO L225 Difference]: With dead ends: 102 [2021-08-21 17:42:42,475 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 17:42:42,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 17:42:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2021-08-21 17:42:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 63 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 137 transitions. [2021-08-21 17:42:42,478 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 137 transitions. Word has length 15 [2021-08-21 17:42:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:42,478 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 137 transitions. [2021-08-21 17:42:42,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 137 transitions. [2021-08-21 17:42:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:42,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:42,479 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:42,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:42,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:42,693 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash -213956176, now seen corresponding path program 15 times [2021-08-21 17:42:42,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:42,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381597914] [2021-08-21 17:42:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:42,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:42,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:42,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381597914] [2021-08-21 17:42:42,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381597914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:42,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108721639] [2021-08-21 17:42:42,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:42,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:42,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:42,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:42,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 17:42:43,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:42:43,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:43,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 17:42:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:43,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:43,315 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 17:42:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:43,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108721639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:43,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:43,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:43,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127464673] [2021-08-21 17:42:43,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:43,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:43,408 INFO L87 Difference]: Start difference. First operand 64 states and 137 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:43,641 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2021-08-21 17:42:43,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:42:43,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:42:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:43,642 INFO L225 Difference]: With dead ends: 72 [2021-08-21 17:42:43,642 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 17:42:43,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:42:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 17:42:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-08-21 17:42:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 135 transitions. [2021-08-21 17:42:43,645 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 135 transitions. Word has length 15 [2021-08-21 17:42:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:43,645 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 135 transitions. [2021-08-21 17:42:43,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 135 transitions. [2021-08-21 17:42:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:43,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:43,646 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:43,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:43,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:43,862 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash 466102194, now seen corresponding path program 16 times [2021-08-21 17:42:43,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:43,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976700668] [2021-08-21 17:42:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:43,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:43,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:43,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976700668] [2021-08-21 17:42:43,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976700668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:43,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106683219] [2021-08-21 17:42:43,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:43,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:43,913 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:43,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 17:42:44,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:44,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:44,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:42:44,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106683219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:44,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:44,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:42:44,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075212648] [2021-08-21 17:42:44,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:44,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:44,165 INFO L87 Difference]: Start difference. First operand 64 states and 135 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:44,232 INFO L93 Difference]: Finished difference Result 119 states and 206 transitions. [2021-08-21 17:42:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:42:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-08-21 17:42:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:44,234 INFO L225 Difference]: With dead ends: 119 [2021-08-21 17:42:44,234 INFO L226 Difference]: Without dead ends: 119 [2021-08-21 17:42:44,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:42:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-21 17:42:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 73. [2021-08-21 17:42:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 72 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) [2021-08-21 17:42:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 157 transitions. [2021-08-21 17:42:44,237 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 157 transitions. Word has length 15 [2021-08-21 17:42:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:44,237 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 157 transitions. [2021-08-21 17:42:44,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 157 transitions. [2021-08-21 17:42:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:44,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:44,238 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:44,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:44,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:44,441 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash 880135412, now seen corresponding path program 17 times [2021-08-21 17:42:44,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:44,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728935101] [2021-08-21 17:42:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:44,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:44,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:44,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728935101] [2021-08-21 17:42:44,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728935101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:44,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634035425] [2021-08-21 17:42:44,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:42:44,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:44,624 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:44,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 17:42:44,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:42:44,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:44,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 17:42:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:45,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:45,132 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 17:42:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:45,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634035425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:45,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:45,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:45,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496906584] [2021-08-21 17:42:45,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:45,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:45,193 INFO L87 Difference]: Start difference. First operand 73 states and 157 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:45,411 INFO L93 Difference]: Finished difference Result 82 states and 169 transitions. [2021-08-21 17:42:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:42:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:42:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:45,414 INFO L225 Difference]: With dead ends: 82 [2021-08-21 17:42:45,414 INFO L226 Difference]: Without dead ends: 76 [2021-08-21 17:42:45,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:42:45,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-21 17:42:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-08-21 17:42:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 156 transitions. [2021-08-21 17:42:45,416 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 156 transitions. Word has length 15 [2021-08-21 17:42:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:45,417 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 156 transitions. [2021-08-21 17:42:45,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 156 transitions. [2021-08-21 17:42:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:45,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:45,417 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:45,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 17:42:45,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 17:42:45,633 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:45,633 INFO L82 PathProgramCache]: Analyzing trace with hash 487108402, now seen corresponding path program 18 times [2021-08-21 17:42:45,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:45,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570155478] [2021-08-21 17:42:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:45,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:45,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:45,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570155478] [2021-08-21 17:42:45,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570155478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:45,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270415288] [2021-08-21 17:42:45,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:42:45,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:45,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:45,675 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:45,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 17:42:45,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:42:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:42:45,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:45,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270415288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:45,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:45,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:42:45,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371919215] [2021-08-21 17:42:45,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:45,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:45,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:45,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:45,941 INFO L87 Difference]: Start difference. First operand 73 states and 156 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:46,022 INFO L93 Difference]: Finished difference Result 100 states and 196 transitions. [2021-08-21 17:42:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:42:46,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-08-21 17:42:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:46,023 INFO L225 Difference]: With dead ends: 100 [2021-08-21 17:42:46,023 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 17:42:46,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:42:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 17:42:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-08-21 17:42:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1772151898734178) internal successors, (172), 79 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 172 transitions. [2021-08-21 17:42:46,026 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 172 transitions. Word has length 15 [2021-08-21 17:42:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:46,026 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 172 transitions. [2021-08-21 17:42:46,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 172 transitions. [2021-08-21 17:42:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:46,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:46,027 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:46,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 17:42:46,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 17:42:46,251 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash 437236272, now seen corresponding path program 19 times [2021-08-21 17:42:46,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:46,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088267969] [2021-08-21 17:42:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:46,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:46,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:46,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088267969] [2021-08-21 17:42:46,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088267969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:46,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224842261] [2021-08-21 17:42:46,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:46,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:46,386 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:46,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 17:42:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:46,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 17:42:46,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:46,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:46,853 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 17:42:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:46,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224842261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:46,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:46,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:46,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227375958] [2021-08-21 17:42:46,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:46,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:46,959 INFO L87 Difference]: Start difference. First operand 80 states and 172 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:47,153 INFO L93 Difference]: Finished difference Result 92 states and 191 transitions. [2021-08-21 17:42:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:42:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:42:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:47,154 INFO L225 Difference]: With dead ends: 92 [2021-08-21 17:42:47,154 INFO L226 Difference]: Without dead ends: 86 [2021-08-21 17:42:47,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:42:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-21 17:42:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-08-21 17:42:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1772151898734178) internal successors, (172), 79 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 172 transitions. [2021-08-21 17:42:47,157 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 172 transitions. Word has length 15 [2021-08-21 17:42:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:47,157 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 172 transitions. [2021-08-21 17:42:47,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 172 transitions. [2021-08-21 17:42:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:47,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:47,158 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:47,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:47,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:47,358 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -372110354, now seen corresponding path program 20 times [2021-08-21 17:42:47,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:47,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281972217] [2021-08-21 17:42:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:47,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:47,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:47,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281972217] [2021-08-21 17:42:47,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281972217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:47,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581665602] [2021-08-21 17:42:47,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:47,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:47,398 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:47,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 17:42:47,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:47,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:47,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:42:47,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:47,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581665602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:47,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:47,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:42:47,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856469134] [2021-08-21 17:42:47,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:42:47,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:42:47,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:42:47,673 INFO L87 Difference]: Start difference. First operand 80 states and 172 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:47,707 INFO L93 Difference]: Finished difference Result 129 states and 244 transitions. [2021-08-21 17:42:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:42:47,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 15 [2021-08-21 17:42:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:47,708 INFO L225 Difference]: With dead ends: 129 [2021-08-21 17:42:47,708 INFO L226 Difference]: Without dead ends: 129 [2021-08-21 17:42:47,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-21 17:42:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2021-08-21 17:42:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-08-21 17:42:47,712 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 15 [2021-08-21 17:42:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:47,712 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-08-21 17:42:47,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-08-21 17:42:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:47,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:47,713 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:47,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:47,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:47,929 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:47,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1117294642, now seen corresponding path program 21 times [2021-08-21 17:42:47,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:47,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183901233] [2021-08-21 17:42:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:47,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:47,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:47,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183901233] [2021-08-21 17:42:47,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183901233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:47,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283075363] [2021-08-21 17:42:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:47,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:47,972 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:47,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 17:42:48,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:42:48,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:48,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:42:48,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:48,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283075363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:48,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:48,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:42:48,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734614567] [2021-08-21 17:42:48,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:48,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:48,273 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:48,328 INFO L93 Difference]: Finished difference Result 136 states and 251 transitions. [2021-08-21 17:42:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:42:48,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-08-21 17:42:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:48,329 INFO L225 Difference]: With dead ends: 136 [2021-08-21 17:42:48,329 INFO L226 Difference]: Without dead ends: 136 [2021-08-21 17:42:48,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:42:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-21 17:42:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 92. [2021-08-21 17:42:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-08-21 17:42:48,333 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 15 [2021-08-21 17:42:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:48,333 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-08-21 17:42:48,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-08-21 17:42:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:48,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:48,333 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:48,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:48,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 17:42:48,556 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:48,557 INFO L82 PathProgramCache]: Analyzing trace with hash 44209262, now seen corresponding path program 22 times [2021-08-21 17:42:48,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:48,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140427550] [2021-08-21 17:42:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:48,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:48,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:48,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140427550] [2021-08-21 17:42:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140427550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:48,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668146522] [2021-08-21 17:42:48,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:48,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:48,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:48,603 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:48,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 17:42:48,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:48,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:42:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:48,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668146522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:48,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:48,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:42:48,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461172134] [2021-08-21 17:42:48,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:48,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:48,898 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:48,961 INFO L93 Difference]: Finished difference Result 102 states and 211 transitions. [2021-08-21 17:42:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:42:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-08-21 17:42:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:48,962 INFO L225 Difference]: With dead ends: 102 [2021-08-21 17:42:48,962 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 17:42:48,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:42:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 17:42:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-08-21 17:42:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-08-21 17:42:48,965 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 15 [2021-08-21 17:42:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:48,965 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-08-21 17:42:48,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-08-21 17:42:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:42:48,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:48,965 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:48,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:49,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 17:42:49,166 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1138300850, now seen corresponding path program 23 times [2021-08-21 17:42:49,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:49,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626875215] [2021-08-21 17:42:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:49,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:49,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:49,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626875215] [2021-08-21 17:42:49,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626875215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:49,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956026062] [2021-08-21 17:42:49,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:42:49,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:49,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:49,211 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:49,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 17:42:49,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:42:49,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:42:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:49,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956026062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:49,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:49,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:42:49,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218675565] [2021-08-21 17:42:49,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:49,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:49,500 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:49,577 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-08-21 17:42:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:49,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-08-21 17:42:49,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:49,580 INFO L225 Difference]: With dead ends: 111 [2021-08-21 17:42:49,580 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 17:42:49,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:42:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 17:42:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2021-08-21 17:42:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1752577319587627) internal successors, (211), 97 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 211 transitions. [2021-08-21 17:42:49,584 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 211 transitions. Word has length 15 [2021-08-21 17:42:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:49,584 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 211 transitions. [2021-08-21 17:42:49,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 211 transitions. [2021-08-21 17:42:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:49,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:49,584 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:49,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 17:42:49,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 17:42:49,801 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2081848661, now seen corresponding path program 24 times [2021-08-21 17:42:49,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:49,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293832838] [2021-08-21 17:42:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:49,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:49,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:49,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293832838] [2021-08-21 17:42:49,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293832838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:49,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584396813] [2021-08-21 17:42:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:42:49,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:49,892 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:49,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 17:42:50,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:42:50,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:50,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:42:50,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:50,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:50,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 17:42:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:50,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584396813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:50,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:50,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:50,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078295616] [2021-08-21 17:42:50,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:50,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:50,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:50,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:50,686 INFO L87 Difference]: Start difference. First operand 98 states and 211 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:50,911 INFO L93 Difference]: Finished difference Result 124 states and 265 transitions. [2021-08-21 17:42:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:42:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 16 [2021-08-21 17:42:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:50,912 INFO L225 Difference]: With dead ends: 124 [2021-08-21 17:42:50,912 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 17:42:50,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:42:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 17:42:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-08-21 17:42:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.2149532710280373) internal successors, (237), 107 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 237 transitions. [2021-08-21 17:42:50,916 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 237 transitions. Word has length 16 [2021-08-21 17:42:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:50,916 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 237 transitions. [2021-08-21 17:42:50,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 237 transitions. [2021-08-21 17:42:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:50,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:50,917 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:50,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 17:42:51,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 17:42:51,137 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1032859697, now seen corresponding path program 25 times [2021-08-21 17:42:51,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:51,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941529354] [2021-08-21 17:42:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:51,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:51,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:51,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941529354] [2021-08-21 17:42:51,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941529354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:51,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302314742] [2021-08-21 17:42:51,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:51,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:51,177 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:51,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 17:42:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:51,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:42:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302314742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:51,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:51,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:42:51,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491406205] [2021-08-21 17:42:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:51,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:51,521 INFO L87 Difference]: Start difference. First operand 108 states and 237 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:51,563 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-08-21 17:42:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:42:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 16 [2021-08-21 17:42:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:51,567 INFO L225 Difference]: With dead ends: 163 [2021-08-21 17:42:51,567 INFO L226 Difference]: Without dead ends: 163 [2021-08-21 17:42:51,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:42:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-21 17:42:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2021-08-21 17:42:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.220183486238532) internal successors, (242), 109 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 242 transitions. [2021-08-21 17:42:51,571 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 242 transitions. Word has length 16 [2021-08-21 17:42:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:51,571 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 242 transitions. [2021-08-21 17:42:51,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 242 transitions. [2021-08-21 17:42:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:51,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:51,572 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:51,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 17:42:51,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:51,791 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash 769120943, now seen corresponding path program 26 times [2021-08-21 17:42:51,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:51,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524411338] [2021-08-21 17:42:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:51,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:51,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:51,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524411338] [2021-08-21 17:42:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524411338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:51,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222561927] [2021-08-21 17:42:51,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:51,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:51,941 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:51,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 17:42:52,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:52,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:42:52,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:52,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:52,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 17:42:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:52,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222561927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:52,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:52,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:52,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720164654] [2021-08-21 17:42:52,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:52,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:52,730 INFO L87 Difference]: Start difference. First operand 110 states and 242 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:52,897 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2021-08-21 17:42:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:52,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 16 [2021-08-21 17:42:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:52,899 INFO L225 Difference]: With dead ends: 121 [2021-08-21 17:42:52,899 INFO L226 Difference]: Without dead ends: 117 [2021-08-21 17:42:52,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:42:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-21 17:42:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2021-08-21 17:42:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.220183486238532) internal successors, (242), 109 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 242 transitions. [2021-08-21 17:42:52,902 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 242 transitions. Word has length 16 [2021-08-21 17:42:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:52,902 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 242 transitions. [2021-08-21 17:42:52,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 242 transitions. [2021-08-21 17:42:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:52,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:52,903 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:52,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:53,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:53,119 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:53,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179313, now seen corresponding path program 27 times [2021-08-21 17:42:53,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:53,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901476651] [2021-08-21 17:42:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:53,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:53,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:53,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901476651] [2021-08-21 17:42:53,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901476651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:53,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035759919] [2021-08-21 17:42:53,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:53,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:53,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:53,164 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:53,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 17:42:53,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:42:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:42:53,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:53,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035759919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:53,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:53,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:42:53,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436021106] [2021-08-21 17:42:53,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:53,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:53,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:53,504 INFO L87 Difference]: Start difference. First operand 110 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:53,551 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-08-21 17:42:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:42:53,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 16 [2021-08-21 17:42:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:53,553 INFO L225 Difference]: With dead ends: 168 [2021-08-21 17:42:53,553 INFO L226 Difference]: Without dead ends: 168 [2021-08-21 17:42:53,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:42:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-21 17:42:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 110. [2021-08-21 17:42:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.220183486238532) internal successors, (242), 109 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 242 transitions. [2021-08-21 17:42:53,556 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 242 transitions. Word has length 16 [2021-08-21 17:42:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:53,557 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 242 transitions. [2021-08-21 17:42:53,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 242 transitions. [2021-08-21 17:42:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:53,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:53,557 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:53,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:53,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 17:42:53,773 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1863212531, now seen corresponding path program 28 times [2021-08-21 17:42:53,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:53,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023048459] [2021-08-21 17:42:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:53,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:53,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:53,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023048459] [2021-08-21 17:42:53,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023048459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:53,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178154847] [2021-08-21 17:42:53,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:53,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:53,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:53,879 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:53,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 17:42:54,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:54,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:42:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:54,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:54,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 17:42:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:54,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178154847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:54,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:54,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:54,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922504131] [2021-08-21 17:42:54,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:54,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:54,792 INFO L87 Difference]: Start difference. First operand 110 states and 242 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:54,980 INFO L93 Difference]: Finished difference Result 118 states and 254 transitions. [2021-08-21 17:42:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 16 [2021-08-21 17:42:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:54,982 INFO L225 Difference]: With dead ends: 118 [2021-08-21 17:42:54,982 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 17:42:54,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:42:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 17:42:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-08-21 17:42:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.220183486238532) internal successors, (242), 109 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 242 transitions. [2021-08-21 17:42:54,986 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 242 transitions. Word has length 16 [2021-08-21 17:42:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:54,986 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 242 transitions. [2021-08-21 17:42:54,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 242 transitions. [2021-08-21 17:42:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:54,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:54,988 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:55,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:55,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:55,214 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1751696395, now seen corresponding path program 29 times [2021-08-21 17:42:55,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:55,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278799207] [2021-08-21 17:42:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:55,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:55,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:55,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278799207] [2021-08-21 17:42:55,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278799207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:55,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521154469] [2021-08-21 17:42:55,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:42:55,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:55,283 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:55,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 17:42:55,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:42:55,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:42:55,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:55,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521154469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:55,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:55,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:42:55,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815676413] [2021-08-21 17:42:55,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:55,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:55,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:55,632 INFO L87 Difference]: Start difference. First operand 110 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:55,698 INFO L93 Difference]: Finished difference Result 169 states and 320 transitions. [2021-08-21 17:42:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:42:55,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 16 [2021-08-21 17:42:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:55,699 INFO L225 Difference]: With dead ends: 169 [2021-08-21 17:42:55,699 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 17:42:55,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:42:55,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 17:42:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 113. [2021-08-21 17:42:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 252 transitions. [2021-08-21 17:42:55,703 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 252 transitions. Word has length 16 [2021-08-21 17:42:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:55,704 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 252 transitions. [2021-08-21 17:42:55,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 252 transitions. [2021-08-21 17:42:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:55,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:55,704 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:55,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:55,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:55,905 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:55,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1470185521, now seen corresponding path program 30 times [2021-08-21 17:42:55,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:55,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838693207] [2021-08-21 17:42:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:55,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:55,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:55,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838693207] [2021-08-21 17:42:55,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838693207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:55,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257434562] [2021-08-21 17:42:55,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:42:55,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:55,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:55,953 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:55,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 17:42:56,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:42:56,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:42:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:56,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257434562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:56,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:56,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:42:56,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227169162] [2021-08-21 17:42:56,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:42:56,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:42:56,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:42:56,331 INFO L87 Difference]: Start difference. First operand 113 states and 252 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:42:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:56,423 INFO L93 Difference]: Finished difference Result 178 states and 331 transitions. [2021-08-21 17:42:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) Word has length 16 [2021-08-21 17:42:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:56,424 INFO L225 Difference]: With dead ends: 178 [2021-08-21 17:42:56,424 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 17:42:56,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:42:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 17:42:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-08-21 17:42:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.230088495575221) internal successors, (252), 113 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 252 transitions. [2021-08-21 17:42:56,428 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 252 transitions. Word has length 16 [2021-08-21 17:42:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:56,428 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 252 transitions. [2021-08-21 17:42:56,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:42:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 252 transitions. [2021-08-21 17:42:56,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:56,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:56,429 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:56,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:56,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 17:42:56,629 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1420313391, now seen corresponding path program 31 times [2021-08-21 17:42:56,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:56,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966148654] [2021-08-21 17:42:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:56,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:56,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:56,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966148654] [2021-08-21 17:42:56,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966148654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:56,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997986503] [2021-08-21 17:42:56,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:56,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:56,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:56,727 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:56,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 17:42:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:42:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:57,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:42:57,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 17:42:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997986503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:57,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:57,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:42:57,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038029197] [2021-08-21 17:42:57,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:42:57,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:42:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:57,617 INFO L87 Difference]: Start difference. First operand 114 states and 252 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:57,755 INFO L93 Difference]: Finished difference Result 125 states and 271 transitions. [2021-08-21 17:42:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:42:57,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 16 [2021-08-21 17:42:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:57,756 INFO L225 Difference]: With dead ends: 125 [2021-08-21 17:42:57,756 INFO L226 Difference]: Without dead ends: 121 [2021-08-21 17:42:57,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:42:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-21 17:42:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2021-08-21 17:42:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.236842105263158) internal successors, (255), 114 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 255 transitions. [2021-08-21 17:42:57,760 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 255 transitions. Word has length 16 [2021-08-21 17:42:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:57,760 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 255 transitions. [2021-08-21 17:42:57,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 255 transitions. [2021-08-21 17:42:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:57,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:57,761 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:57,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:57,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 17:42:57,977 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 610966765, now seen corresponding path program 32 times [2021-08-21 17:42:57,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:57,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7515045] [2021-08-21 17:42:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:57,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:58,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:58,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7515045] [2021-08-21 17:42:58,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7515045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:58,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504184951] [2021-08-21 17:42:58,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:58,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:58,016 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:58,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 17:42:58,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:58,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:42:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:42:58,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504184951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:58,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:58,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:42:58,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071352129] [2021-08-21 17:42:58,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:42:58,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:42:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:42:58,394 INFO L87 Difference]: Start difference. First operand 115 states and 255 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:58,438 INFO L93 Difference]: Finished difference Result 163 states and 325 transitions. [2021-08-21 17:42:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:42:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 16 [2021-08-21 17:42:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:58,444 INFO L225 Difference]: With dead ends: 163 [2021-08-21 17:42:58,444 INFO L226 Difference]: Without dead ends: 163 [2021-08-21 17:42:58,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-21 17:42:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2021-08-21 17:42:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.236641221374046) internal successors, (293), 131 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 293 transitions. [2021-08-21 17:42:58,448 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 293 transitions. Word has length 16 [2021-08-21 17:42:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:58,448 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 293 transitions. [2021-08-21 17:42:58,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 293 transitions. [2021-08-21 17:42:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:58,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:58,449 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:58,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:58,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 17:42:58,673 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2100371761, now seen corresponding path program 33 times [2021-08-21 17:42:58,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:58,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225630882] [2021-08-21 17:42:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:58,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:58,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:58,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225630882] [2021-08-21 17:42:58,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225630882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:58,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922629628] [2021-08-21 17:42:58,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:58,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:58,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:58,719 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:58,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 17:42:59,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:42:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:42:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:59,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922629628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:59,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:59,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:42:59,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762156850] [2021-08-21 17:42:59,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:42:59,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:42:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:42:59,105 INFO L87 Difference]: Start difference. First operand 132 states and 293 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:59,155 INFO L93 Difference]: Finished difference Result 170 states and 332 transitions. [2021-08-21 17:42:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:42:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 16 [2021-08-21 17:42:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:59,162 INFO L225 Difference]: With dead ends: 170 [2021-08-21 17:42:59,162 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 17:42:59,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:42:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 17:42:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2021-08-21 17:42:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.225) internal successors, (267), 120 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 267 transitions. [2021-08-21 17:42:59,166 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 267 transitions. Word has length 16 [2021-08-21 17:42:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:59,166 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 267 transitions. [2021-08-21 17:42:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:42:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 267 transitions. [2021-08-21 17:42:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:59,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:59,167 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:59,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 17:42:59,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:59,377 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:59,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1027286381, now seen corresponding path program 34 times [2021-08-21 17:42:59,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:59,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509983289] [2021-08-21 17:42:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:59,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:59,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:59,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509983289] [2021-08-21 17:42:59,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509983289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:59,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104178178] [2021-08-21 17:42:59,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:59,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:59,422 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:59,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 17:42:59,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:42:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:59,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104178178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:59,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:59,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:42:59,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078306879] [2021-08-21 17:42:59,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:42:59,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:42:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:42:59,831 INFO L87 Difference]: Start difference. First operand 121 states and 267 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:42:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:59,918 INFO L93 Difference]: Finished difference Result 170 states and 322 transitions. [2021-08-21 17:42:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:42:59,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) Word has length 16 [2021-08-21 17:42:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:59,920 INFO L225 Difference]: With dead ends: 170 [2021-08-21 17:42:59,920 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 17:42:59,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:42:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 17:42:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 115. [2021-08-21 17:42:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-08-21 17:42:59,923 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 16 [2021-08-21 17:42:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:59,923 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-08-21 17:42:59,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:42:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-08-21 17:42:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:42:59,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:59,924 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:59,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 17:43:00,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 17:43:00,125 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2121377969, now seen corresponding path program 35 times [2021-08-21 17:43:00,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:00,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923890256] [2021-08-21 17:43:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:00,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:00,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:00,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923890256] [2021-08-21 17:43:00,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923890256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:00,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594044970] [2021-08-21 17:43:00,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:00,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:00,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:00,203 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:00,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 17:43:00,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:43:00,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:43:00,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:00,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594044970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:00,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:00,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:43:00,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243130307] [2021-08-21 17:43:00,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:00,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:00,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:00,608 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:00,703 INFO L93 Difference]: Finished difference Result 135 states and 286 transitions. [2021-08-21 17:43:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:43:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) Word has length 16 [2021-08-21 17:43:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:00,705 INFO L225 Difference]: With dead ends: 135 [2021-08-21 17:43:00,705 INFO L226 Difference]: Without dead ends: 135 [2021-08-21 17:43:00,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:43:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-21 17:43:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2021-08-21 17:43:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.232142857142857) internal successors, (250), 112 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 250 transitions. [2021-08-21 17:43:00,709 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 250 transitions. Word has length 16 [2021-08-21 17:43:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:00,709 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 250 transitions. [2021-08-21 17:43:00,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 250 transitions. [2021-08-21 17:43:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:43:00,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:00,710 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:00,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:00,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 17:43:00,925 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 575341939, now seen corresponding path program 36 times [2021-08-21 17:43:00,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:00,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394846106] [2021-08-21 17:43:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:00,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:01,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:01,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394846106] [2021-08-21 17:43:01,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394846106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:01,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275192356] [2021-08-21 17:43:01,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:01,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:01,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:01,019 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:01,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 17:43:01,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:43:01,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:43:01,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:01,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 17:43:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:01,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275192356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:01,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:01,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:43:01,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507584562] [2021-08-21 17:43:01,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:43:01,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:43:01,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:43:01,860 INFO L87 Difference]: Start difference. First operand 113 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:02,113 INFO L93 Difference]: Finished difference Result 144 states and 316 transitions. [2021-08-21 17:43:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:43:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 16 [2021-08-21 17:43:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:02,114 INFO L225 Difference]: With dead ends: 144 [2021-08-21 17:43:02,114 INFO L226 Difference]: Without dead ends: 140 [2021-08-21 17:43:02,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:43:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-21 17:43:02,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2021-08-21 17:43:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.2777777777777777) internal successors, (287), 126 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 287 transitions. [2021-08-21 17:43:02,118 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 287 transitions. Word has length 16 [2021-08-21 17:43:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:02,118 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 287 transitions. [2021-08-21 17:43:02,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 287 transitions. [2021-08-21 17:43:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:43:02,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:02,118 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:02,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 17:43:02,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:02,325 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -234004687, now seen corresponding path program 37 times [2021-08-21 17:43:02,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:02,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189157605] [2021-08-21 17:43:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:02,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:02,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:02,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189157605] [2021-08-21 17:43:02,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189157605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:02,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502295964] [2021-08-21 17:43:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:02,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:02,371 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:02,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 17:43:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:43:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:02,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502295964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:02,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:02,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:43:02,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081369212] [2021-08-21 17:43:02,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:43:02,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:43:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:02,787 INFO L87 Difference]: Start difference. First operand 127 states and 287 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:02,836 INFO L93 Difference]: Finished difference Result 178 states and 349 transitions. [2021-08-21 17:43:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:43:02,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 16 [2021-08-21 17:43:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:02,838 INFO L225 Difference]: With dead ends: 178 [2021-08-21 17:43:02,838 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 17:43:02,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 17:43:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-08-21 17:43:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2857142857142856) internal successors, (304), 133 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) [2021-08-21 17:43:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 304 transitions. [2021-08-21 17:43:02,841 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 304 transitions. Word has length 16 [2021-08-21 17:43:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:02,841 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 304 transitions. [2021-08-21 17:43:02,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 304 transitions. [2021-08-21 17:43:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:43:02,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:02,842 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:02,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 17:43:03,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 17:43:03,058 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:03,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1255400309, now seen corresponding path program 38 times [2021-08-21 17:43:03,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:03,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092156466] [2021-08-21 17:43:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:03,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:03,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:03,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092156466] [2021-08-21 17:43:03,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092156466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:03,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527723462] [2021-08-21 17:43:03,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:03,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:03,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:03,110 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:03,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 17:43:03,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:43:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:03,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527723462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:03,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:03,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:43:03,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007567223] [2021-08-21 17:43:03,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:43:03,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:43:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:03,649 INFO L87 Difference]: Start difference. First operand 134 states and 304 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:03,695 INFO L93 Difference]: Finished difference Result 175 states and 366 transitions. [2021-08-21 17:43:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:43:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 16 [2021-08-21 17:43:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:03,696 INFO L225 Difference]: With dead ends: 175 [2021-08-21 17:43:03,696 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 17:43:03,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 17:43:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2021-08-21 17:43:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2021-08-21 17:43:03,700 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 16 [2021-08-21 17:43:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:03,702 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2021-08-21 17:43:03,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2021-08-21 17:43:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:43:03,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:03,703 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:03,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:03,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:03,925 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash 182314929, now seen corresponding path program 39 times [2021-08-21 17:43:03,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:03,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546247727] [2021-08-21 17:43:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:03,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:03,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:03,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546247727] [2021-08-21 17:43:03,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546247727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:03,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728458242] [2021-08-21 17:43:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:03,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:03,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:03,981 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:03,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 17:43:04,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:43:04,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:43:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:04,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728458242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:04,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:04,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:43:04,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737589087] [2021-08-21 17:43:04,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:04,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:04,413 INFO L87 Difference]: Start difference. First operand 151 states and 340 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:04,489 INFO L93 Difference]: Finished difference Result 182 states and 373 transitions. [2021-08-21 17:43:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:43:04,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) Word has length 16 [2021-08-21 17:43:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:04,490 INFO L225 Difference]: With dead ends: 182 [2021-08-21 17:43:04,490 INFO L226 Difference]: Without dead ends: 182 [2021-08-21 17:43:04,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:43:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-21 17:43:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 148. [2021-08-21 17:43:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.2653061224489797) internal successors, (333), 147 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 333 transitions. [2021-08-21 17:43:04,494 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 333 transitions. Word has length 16 [2021-08-21 17:43:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:04,494 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 333 transitions. [2021-08-21 17:43:04,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 333 transitions. [2021-08-21 17:43:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:43:04,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:04,495 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:04,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 17:43:04,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:04,705 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1276406517, now seen corresponding path program 40 times [2021-08-21 17:43:04,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:04,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835210922] [2021-08-21 17:43:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:04,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:04,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:04,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835210922] [2021-08-21 17:43:04,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835210922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:04,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104460814] [2021-08-21 17:43:04,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:04,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:04,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:04,764 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 17:43:05,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:43:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:05,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104460814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:05,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:05,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:43:05,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428139501] [2021-08-21 17:43:05,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:05,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:05,194 INFO L87 Difference]: Start difference. First operand 148 states and 333 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:05,252 INFO L93 Difference]: Finished difference Result 154 states and 345 transitions. [2021-08-21 17:43:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:43:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) Word has length 16 [2021-08-21 17:43:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:05,253 INFO L225 Difference]: With dead ends: 154 [2021-08-21 17:43:05,253 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 17:43:05,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:43:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 17:43:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-08-21 17:43:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.2653061224489797) internal successors, (333), 147 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 333 transitions. [2021-08-21 17:43:05,256 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 333 transitions. Word has length 16 [2021-08-21 17:43:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:05,256 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 333 transitions. [2021-08-21 17:43:05,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 333 transitions. [2021-08-21 17:43:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:43:05,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:05,257 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:05,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:05,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 17:43:05,465 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:05,465 INFO L82 PathProgramCache]: Analyzing trace with hash 833507377, now seen corresponding path program 41 times [2021-08-21 17:43:05,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:05,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731641273] [2021-08-21 17:43:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:05,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:05,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:05,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731641273] [2021-08-21 17:43:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731641273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:05,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948436312] [2021-08-21 17:43:05,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:05,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:05,516 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:05,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 17:43:05,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:43:05,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:43:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:05,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948436312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:05,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:05,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:43:05,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399554631] [2021-08-21 17:43:05,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:05,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:05,973 INFO L87 Difference]: Start difference. First operand 148 states and 333 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:06,067 INFO L93 Difference]: Finished difference Result 181 states and 399 transitions. [2021-08-21 17:43:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:43:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) Word has length 16 [2021-08-21 17:43:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:06,068 INFO L225 Difference]: With dead ends: 181 [2021-08-21 17:43:06,068 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 17:43:06,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:43:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 17:43:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-08-21 17:43:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2532467532467533) internal successors, (347), 154 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 347 transitions. [2021-08-21 17:43:06,071 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 347 transitions. Word has length 16 [2021-08-21 17:43:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:06,071 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 347 transitions. [2021-08-21 17:43:06,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-08-21 17:43:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 347 transitions. [2021-08-21 17:43:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:06,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:06,072 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:06,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 17:43:06,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 17:43:06,293 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash 938419154, now seen corresponding path program 42 times [2021-08-21 17:43:06,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:06,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811125489] [2021-08-21 17:43:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:06,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:06,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:06,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811125489] [2021-08-21 17:43:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811125489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:06,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050776879] [2021-08-21 17:43:06,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:06,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:06,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:06,350 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:06,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 17:43:06,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:43:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:06,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050776879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:06,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:06,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:06,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332784143] [2021-08-21 17:43:06,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:06,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:06,826 INFO L87 Difference]: Start difference. First operand 155 states and 347 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:06,938 INFO L93 Difference]: Finished difference Result 209 states and 411 transitions. [2021-08-21 17:43:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:43:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:06,939 INFO L225 Difference]: With dead ends: 209 [2021-08-21 17:43:06,939 INFO L226 Difference]: Without dead ends: 207 [2021-08-21 17:43:06,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:43:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-21 17:43:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 153. [2021-08-21 17:43:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2565789473684212) internal successors, (343), 152 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 343 transitions. [2021-08-21 17:43:06,943 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 343 transitions. Word has length 17 [2021-08-21 17:43:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:06,943 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 343 transitions. [2021-08-21 17:43:06,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 343 transitions. [2021-08-21 17:43:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:06,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:06,944 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:06,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:07,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 17:43:07,167 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:07,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:07,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1802499018, now seen corresponding path program 43 times [2021-08-21 17:43:07,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:07,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10377227] [2021-08-21 17:43:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:07,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:07,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:07,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10377227] [2021-08-21 17:43:07,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10377227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:07,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767994121] [2021-08-21 17:43:07,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:07,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:07,219 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:07,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 17:43:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:07,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767994121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:07,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:07,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:07,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584301719] [2021-08-21 17:43:07,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:07,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:07,678 INFO L87 Difference]: Start difference. First operand 153 states and 343 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:07,771 INFO L93 Difference]: Finished difference Result 192 states and 422 transitions. [2021-08-21 17:43:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:43:07,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:07,772 INFO L225 Difference]: With dead ends: 192 [2021-08-21 17:43:07,772 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 17:43:07,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:43:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 17:43:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2021-08-21 17:43:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.3294117647058825) internal successors, (396), 170 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 396 transitions. [2021-08-21 17:43:07,776 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 396 transitions. Word has length 17 [2021-08-21 17:43:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:07,776 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 396 transitions. [2021-08-21 17:43:07,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 396 transitions. [2021-08-21 17:43:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:07,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:07,777 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:07,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 17:43:07,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:07,993 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1443479314, now seen corresponding path program 44 times [2021-08-21 17:43:07,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:07,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880739797] [2021-08-21 17:43:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:07,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:08,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:08,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880739797] [2021-08-21 17:43:08,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880739797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:08,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959471884] [2021-08-21 17:43:08,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:08,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:08,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:08,051 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:08,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 17:43:08,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:08,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:08,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959471884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:08,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:08,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:43:08,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36816870] [2021-08-21 17:43:08,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:08,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:08,513 INFO L87 Difference]: Start difference. First operand 171 states and 396 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:08,555 INFO L93 Difference]: Finished difference Result 217 states and 442 transitions. [2021-08-21 17:43:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:43:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:08,557 INFO L225 Difference]: With dead ends: 217 [2021-08-21 17:43:08,557 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 17:43:08,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 17:43:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2021-08-21 17:43:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2875) internal successors, (366), 160 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 366 transitions. [2021-08-21 17:43:08,560 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 366 transitions. Word has length 17 [2021-08-21 17:43:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:08,560 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 366 transitions. [2021-08-21 17:43:08,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 366 transitions. [2021-08-21 17:43:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:08,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:08,560 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:08,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:08,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 17:43:08,761 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:08,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1859798930, now seen corresponding path program 45 times [2021-08-21 17:43:08,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:08,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257052731] [2021-08-21 17:43:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:08,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:08,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:08,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257052731] [2021-08-21 17:43:08,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257052731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:08,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200653288] [2021-08-21 17:43:08,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:08,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:08,812 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:08,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 17:43:09,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:43:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200653288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:09,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:09,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:43:09,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519834705] [2021-08-21 17:43:09,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:09,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:09,273 INFO L87 Difference]: Start difference. First operand 161 states and 366 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:09,327 INFO L93 Difference]: Finished difference Result 218 states and 450 transitions. [2021-08-21 17:43:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:43:09,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:09,338 INFO L225 Difference]: With dead ends: 218 [2021-08-21 17:43:09,338 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 17:43:09,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:43:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 17:43:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 168. [2021-08-21 17:43:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 386 transitions. [2021-08-21 17:43:09,342 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 386 transitions. Word has length 17 [2021-08-21 17:43:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:09,342 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 386 transitions. [2021-08-21 17:43:09,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 386 transitions. [2021-08-21 17:43:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:09,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:09,343 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:09,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:09,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 17:43:09,565 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1880805138, now seen corresponding path program 46 times [2021-08-21 17:43:09,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:09,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236105843] [2021-08-21 17:43:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:09,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:09,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:09,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236105843] [2021-08-21 17:43:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236105843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:09,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203836192] [2021-08-21 17:43:09,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:09,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:09,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:09,612 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:09,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 17:43:10,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:10,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:10,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:10,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203836192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:10,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:10,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:10,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555179981] [2021-08-21 17:43:10,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:10,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:10,084 INFO L87 Difference]: Start difference. First operand 168 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:10,169 INFO L93 Difference]: Finished difference Result 218 states and 458 transitions. [2021-08-21 17:43:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:43:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:10,170 INFO L225 Difference]: With dead ends: 218 [2021-08-21 17:43:10,170 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 17:43:10,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:43:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 17:43:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 168. [2021-08-21 17:43:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 386 transitions. [2021-08-21 17:43:10,174 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 386 transitions. Word has length 17 [2021-08-21 17:43:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:10,174 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 386 transitions. [2021-08-21 17:43:10,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 386 transitions. [2021-08-21 17:43:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:10,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:10,175 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:10,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:10,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:10,389 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1544333580, now seen corresponding path program 47 times [2021-08-21 17:43:10,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:10,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741326737] [2021-08-21 17:43:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:10,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:10,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:10,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741326737] [2021-08-21 17:43:10,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741326737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:10,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395748924] [2021-08-21 17:43:10,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:10,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:10,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:10,445 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:10,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 17:43:10,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:43:10,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395748924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:10,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:10,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:43:10,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272723694] [2021-08-21 17:43:10,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:43:10,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:43:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:43:10,939 INFO L87 Difference]: Start difference. First operand 168 states and 386 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:10,996 INFO L93 Difference]: Finished difference Result 207 states and 434 transitions. [2021-08-21 17:43:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:43:10,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 17 [2021-08-21 17:43:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:10,998 INFO L225 Difference]: With dead ends: 207 [2021-08-21 17:43:10,998 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 17:43:10,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:43:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 17:43:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2021-08-21 17:43:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.310734463276836) internal successors, (409), 177 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 409 transitions. [2021-08-21 17:43:11,002 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 409 transitions. Word has length 17 [2021-08-21 17:43:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:11,002 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 409 transitions. [2021-08-21 17:43:11,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:11,002 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 409 transitions. [2021-08-21 17:43:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:11,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:11,003 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:11,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:11,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 17:43:11,213 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1830933008, now seen corresponding path program 48 times [2021-08-21 17:43:11,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:11,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060736745] [2021-08-21 17:43:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:11,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:11,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:11,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060736745] [2021-08-21 17:43:11,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060736745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:11,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372512304] [2021-08-21 17:43:11,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:11,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:11,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:11,269 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:11,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 17:43:11,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:43:11,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:11,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372512304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:11,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:11,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:43:11,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917731310] [2021-08-21 17:43:11,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:43:11,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:43:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:43:11,779 INFO L87 Difference]: Start difference. First operand 178 states and 409 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:11,817 INFO L93 Difference]: Finished difference Result 240 states and 536 transitions. [2021-08-21 17:43:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:43:11,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 17 [2021-08-21 17:43:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:11,819 INFO L225 Difference]: With dead ends: 240 [2021-08-21 17:43:11,819 INFO L226 Difference]: Without dead ends: 240 [2021-08-21 17:43:11,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-21 17:43:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 193. [2021-08-21 17:43:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3645833333333335) internal successors, (454), 192 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 454 transitions. [2021-08-21 17:43:11,823 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 454 transitions. Word has length 17 [2021-08-21 17:43:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:11,823 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 454 transitions. [2021-08-21 17:43:11,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 454 transitions. [2021-08-21 17:43:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:11,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:11,823 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:11,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 17:43:12,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:12,041 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:12,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1021586382, now seen corresponding path program 49 times [2021-08-21 17:43:12,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:12,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005055101] [2021-08-21 17:43:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:12,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:12,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:12,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005055101] [2021-08-21 17:43:12,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005055101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:12,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338891803] [2021-08-21 17:43:12,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:12,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:12,081 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:12,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 17:43:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:12,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:43:12,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338891803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:12,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:12,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:43:12,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325128865] [2021-08-21 17:43:12,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:43:12,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:43:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:43:12,555 INFO L87 Difference]: Start difference. First operand 193 states and 454 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:12,585 INFO L93 Difference]: Finished difference Result 214 states and 470 transitions. [2021-08-21 17:43:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:43:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 17 [2021-08-21 17:43:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:12,586 INFO L225 Difference]: With dead ends: 214 [2021-08-21 17:43:12,586 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 17:43:12,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 17:43:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-08-21 17:43:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.357894736842105) internal successors, (448), 190 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 448 transitions. [2021-08-21 17:43:12,589 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 448 transitions. Word has length 17 [2021-08-21 17:43:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:12,589 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 448 transitions. [2021-08-21 17:43:12,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 448 transitions. [2021-08-21 17:43:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:12,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:12,590 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:12,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:12,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 17:43:12,791 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1783975918, now seen corresponding path program 50 times [2021-08-21 17:43:12,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:12,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430766962] [2021-08-21 17:43:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:12,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:12,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:12,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430766962] [2021-08-21 17:43:12,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430766962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:12,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588146262] [2021-08-21 17:43:12,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:12,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:12,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:12,834 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:12,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 17:43:13,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:13,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:13,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:13,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588146262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:13,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:13,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:43:13,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885383934] [2021-08-21 17:43:13,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:43:13,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:13,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:43:13,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:13,347 INFO L87 Difference]: Start difference. First operand 191 states and 448 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:13,393 INFO L93 Difference]: Finished difference Result 214 states and 470 transitions. [2021-08-21 17:43:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:43:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 17 [2021-08-21 17:43:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:13,394 INFO L225 Difference]: With dead ends: 214 [2021-08-21 17:43:13,394 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 17:43:13,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:43:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 17:43:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-08-21 17:43:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.357894736842105) internal successors, (448), 190 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 448 transitions. [2021-08-21 17:43:13,398 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 448 transitions. Word has length 17 [2021-08-21 17:43:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:13,398 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 448 transitions. [2021-08-21 17:43:13,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 448 transitions. [2021-08-21 17:43:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:13,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:13,398 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:13,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 17:43:13,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 17:43:13,599 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1437905998, now seen corresponding path program 51 times [2021-08-21 17:43:13,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:13,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883993033] [2021-08-21 17:43:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:13,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:13,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:13,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883993033] [2021-08-21 17:43:13,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883993033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:13,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053138972] [2021-08-21 17:43:13,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:13,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:13,681 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:13,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 17:43:14,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:43:14,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:14,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:14,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:14,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053138972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:14,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:14,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:14,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855551595] [2021-08-21 17:43:14,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:14,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:14,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:14,196 INFO L87 Difference]: Start difference. First operand 191 states and 448 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:14,270 INFO L93 Difference]: Finished difference Result 218 states and 478 transitions. [2021-08-21 17:43:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:43:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:14,271 INFO L225 Difference]: With dead ends: 218 [2021-08-21 17:43:14,272 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 17:43:14,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:43:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 17:43:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 191. [2021-08-21 17:43:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.357894736842105) internal successors, (448), 190 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 448 transitions. [2021-08-21 17:43:14,276 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 448 transitions. Word has length 17 [2021-08-21 17:43:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:14,276 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 448 transitions. [2021-08-21 17:43:14,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 448 transitions. [2021-08-21 17:43:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:14,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:14,277 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:14,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:14,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:14,497 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1762969710, now seen corresponding path program 52 times [2021-08-21 17:43:14,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:14,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518216375] [2021-08-21 17:43:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:14,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:14,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:14,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518216375] [2021-08-21 17:43:14,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518216375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:14,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330242656] [2021-08-21 17:43:14,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:14,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:14,545 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:14,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 17:43:14,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:14,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:14,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:14,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330242656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:15,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:15,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:15,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209802642] [2021-08-21 17:43:15,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:15,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:15,031 INFO L87 Difference]: Start difference. First operand 191 states and 448 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:15,132 INFO L93 Difference]: Finished difference Result 231 states and 504 transitions. [2021-08-21 17:43:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:43:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:15,133 INFO L225 Difference]: With dead ends: 231 [2021-08-21 17:43:15,133 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 17:43:15,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:43:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 17:43:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 188. [2021-08-21 17:43:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.3529411764705883) internal successors, (440), 187 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 440 transitions. [2021-08-21 17:43:15,137 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 440 transitions. Word has length 17 [2021-08-21 17:43:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:15,137 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 440 transitions. [2021-08-21 17:43:15,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 440 transitions. [2021-08-21 17:43:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:15,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:15,138 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:15,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 17:43:15,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:15,361 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:15,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1905662264, now seen corresponding path program 53 times [2021-08-21 17:43:15,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:15,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555523658] [2021-08-21 17:43:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:15,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:15,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:15,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555523658] [2021-08-21 17:43:15,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555523658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:15,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184147468] [2021-08-21 17:43:15,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:15,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:15,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:15,403 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:15,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 17:43:15,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:43:15,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:15,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:15,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184147468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:15,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:15,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:43:15,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715353262] [2021-08-21 17:43:15,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:43:15,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:43:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:15,889 INFO L87 Difference]: Start difference. First operand 188 states and 440 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:15,955 INFO L93 Difference]: Finished difference Result 233 states and 492 transitions. [2021-08-21 17:43:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:43:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 17 [2021-08-21 17:43:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:15,957 INFO L225 Difference]: With dead ends: 233 [2021-08-21 17:43:15,957 INFO L226 Difference]: Without dead ends: 232 [2021-08-21 17:43:15,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:43:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-21 17:43:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 196. [2021-08-21 17:43:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.358974358974359) internal successors, (460), 195 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 460 transitions. [2021-08-21 17:43:15,961 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 460 transitions. Word has length 17 [2021-08-21 17:43:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:15,961 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 460 transitions. [2021-08-21 17:43:15,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 460 transitions. [2021-08-21 17:43:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:15,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:15,962 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:15,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:16,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:16,187 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash 985961556, now seen corresponding path program 54 times [2021-08-21 17:43:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:16,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138860968] [2021-08-21 17:43:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:16,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:16,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:16,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138860968] [2021-08-21 17:43:16,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138860968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:16,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184651753] [2021-08-21 17:43:16,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:16,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:16,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:16,239 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:16,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 17:43:16,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:43:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:16,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:16,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184651753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:16,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:16,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:43:16,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243614317] [2021-08-21 17:43:16,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:43:16,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:43:16,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:16,750 INFO L87 Difference]: Start difference. First operand 196 states and 460 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:16,788 INFO L93 Difference]: Finished difference Result 285 states and 642 transitions. [2021-08-21 17:43:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:43:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 17 [2021-08-21 17:43:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:16,789 INFO L225 Difference]: With dead ends: 285 [2021-08-21 17:43:16,789 INFO L226 Difference]: Without dead ends: 285 [2021-08-21 17:43:16,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-21 17:43:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 215. [2021-08-21 17:43:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.397196261682243) internal successors, (513), 214 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 513 transitions. [2021-08-21 17:43:16,794 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 513 transitions. Word has length 17 [2021-08-21 17:43:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:16,794 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 513 transitions. [2021-08-21 17:43:16,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 513 transitions. [2021-08-21 17:43:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:16,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:16,795 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:16,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 17:43:17,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 17:43:17,009 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 176614930, now seen corresponding path program 55 times [2021-08-21 17:43:17,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:17,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261698600] [2021-08-21 17:43:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:17,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:17,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:17,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261698600] [2021-08-21 17:43:17,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261698600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:17,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952382469] [2021-08-21 17:43:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:17,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:17,055 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:17,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 17:43:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:17,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952382469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:17,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:17,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:43:17,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480886664] [2021-08-21 17:43:17,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:43:17,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:43:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:17,546 INFO L87 Difference]: Start difference. First operand 215 states and 513 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:17,584 INFO L93 Difference]: Finished difference Result 246 states and 541 transitions. [2021-08-21 17:43:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:43:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 17 [2021-08-21 17:43:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:17,585 INFO L225 Difference]: With dead ends: 246 [2021-08-21 17:43:17,585 INFO L226 Difference]: Without dead ends: 246 [2021-08-21 17:43:17,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-21 17:43:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 195. [2021-08-21 17:43:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3917525773195876) internal successors, (464), 194 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 464 transitions. [2021-08-21 17:43:17,588 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 464 transitions. Word has length 17 [2021-08-21 17:43:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:17,588 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 464 transitions. [2021-08-21 17:43:17,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 464 transitions. [2021-08-21 17:43:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:17,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:17,589 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:17,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 17:43:17,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 17:43:17,805 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1666019926, now seen corresponding path program 56 times [2021-08-21 17:43:17,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:17,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005603228] [2021-08-21 17:43:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:17,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:17,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:17,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005603228] [2021-08-21 17:43:17,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005603228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:17,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126718038] [2021-08-21 17:43:17,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:17,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:17,854 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:17,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 17:43:18,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:18,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126718038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:18,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:18,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 17:43:18,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012401786] [2021-08-21 17:43:18,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:43:18,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:43:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:43:18,348 INFO L87 Difference]: Start difference. First operand 195 states and 464 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:18,377 INFO L93 Difference]: Finished difference Result 222 states and 502 transitions. [2021-08-21 17:43:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:43:18,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 17 [2021-08-21 17:43:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:18,378 INFO L225 Difference]: With dead ends: 222 [2021-08-21 17:43:18,378 INFO L226 Difference]: Without dead ends: 222 [2021-08-21 17:43:18,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-21 17:43:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2021-08-21 17:43:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.3781094527363185) internal successors, (478), 201 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 478 transitions. [2021-08-21 17:43:18,382 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 478 transitions. Word has length 17 [2021-08-21 17:43:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:18,382 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 478 transitions. [2021-08-21 17:43:18,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-21 17:43:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 478 transitions. [2021-08-21 17:43:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:18,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:18,383 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:18,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:18,601 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash 592934546, now seen corresponding path program 57 times [2021-08-21 17:43:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:18,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063107592] [2021-08-21 17:43:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:18,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:18,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:18,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063107592] [2021-08-21 17:43:18,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063107592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:18,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963980323] [2021-08-21 17:43:18,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:18,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:18,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:18,648 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:18,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 17:43:19,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:43:19,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:19,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:19,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963980323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:19,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:19,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:19,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522952220] [2021-08-21 17:43:19,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:19,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:19,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:19,158 INFO L87 Difference]: Start difference. First operand 202 states and 478 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:19,212 INFO L93 Difference]: Finished difference Result 222 states and 502 transitions. [2021-08-21 17:43:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:43:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:19,213 INFO L225 Difference]: With dead ends: 222 [2021-08-21 17:43:19,213 INFO L226 Difference]: Without dead ends: 222 [2021-08-21 17:43:19,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:43:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-21 17:43:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 194. [2021-08-21 17:43:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.383419689119171) internal successors, (460), 193 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 460 transitions. [2021-08-21 17:43:19,216 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 460 transitions. Word has length 17 [2021-08-21 17:43:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:19,216 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 460 transitions. [2021-08-21 17:43:19,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 460 transitions. [2021-08-21 17:43:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:19,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:19,217 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:19,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:19,441 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:19,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1687026134, now seen corresponding path program 58 times [2021-08-21 17:43:19,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:19,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281863849] [2021-08-21 17:43:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:19,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:19,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:19,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281863849] [2021-08-21 17:43:19,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281863849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:19,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695212849] [2021-08-21 17:43:19,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:19,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:19,496 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:19,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 17:43:20,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:20,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:20,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:20,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:20,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695212849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:20,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:20,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:20,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128851554] [2021-08-21 17:43:20,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:20,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:20,077 INFO L87 Difference]: Start difference. First operand 194 states and 460 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:20,184 INFO L93 Difference]: Finished difference Result 212 states and 480 transitions. [2021-08-21 17:43:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:43:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:20,185 INFO L225 Difference]: With dead ends: 212 [2021-08-21 17:43:20,185 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 17:43:20,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:43:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 17:43:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 188. [2021-08-21 17:43:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.3957219251336896) internal successors, (448), 187 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 448 transitions. [2021-08-21 17:43:20,188 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 448 transitions. Word has length 17 [2021-08-21 17:43:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:20,188 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 448 transitions. [2021-08-21 17:43:20,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 448 transitions. [2021-08-21 17:43:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:20,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:20,189 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:20,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:20,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:20,409 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1244126994, now seen corresponding path program 59 times [2021-08-21 17:43:20,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:20,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219425609] [2021-08-21 17:43:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:20,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:20,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:20,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219425609] [2021-08-21 17:43:20,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219425609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:20,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214290336] [2021-08-21 17:43:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:20,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:20,465 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:20,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 17:43:20,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:43:20,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:20,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:21,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214290336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:21,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:21,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:21,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130063895] [2021-08-21 17:43:21,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:21,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:21,019 INFO L87 Difference]: Start difference. First operand 188 states and 448 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:21,123 INFO L93 Difference]: Finished difference Result 222 states and 516 transitions. [2021-08-21 17:43:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:43:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:21,124 INFO L225 Difference]: With dead ends: 222 [2021-08-21 17:43:21,124 INFO L226 Difference]: Without dead ends: 222 [2021-08-21 17:43:21,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-21 17:43:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 198. [2021-08-21 17:43:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3756345177664975) internal successors, (468), 197 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 468 transitions. [2021-08-21 17:43:21,127 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 468 transitions. Word has length 17 [2021-08-21 17:43:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:21,127 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 468 transitions. [2021-08-21 17:43:21,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 468 transitions. [2021-08-21 17:43:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:21,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:21,128 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:21,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:21,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:21,341 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1481351028, now seen corresponding path program 60 times [2021-08-21 17:43:21,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:21,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928595007] [2021-08-21 17:43:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:21,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:21,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:21,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928595007] [2021-08-21 17:43:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928595007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:21,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986317509] [2021-08-21 17:43:21,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:21,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:21,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:21,394 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:21,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 17:43:21,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:43:21,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:21,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:21,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:21,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986317509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:21,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:21,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:21,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148124922] [2021-08-21 17:43:21,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:21,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:21,945 INFO L87 Difference]: Start difference. First operand 198 states and 468 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:22,030 INFO L93 Difference]: Finished difference Result 251 states and 527 transitions. [2021-08-21 17:43:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:43:22,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:22,031 INFO L225 Difference]: With dead ends: 251 [2021-08-21 17:43:22,032 INFO L226 Difference]: Without dead ends: 250 [2021-08-21 17:43:22,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:43:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-21 17:43:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 205. [2021-08-21 17:43:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3872549019607843) internal successors, (487), 204 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 487 transitions. [2021-08-21 17:43:22,036 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 487 transitions. Word has length 17 [2021-08-21 17:43:22,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:22,036 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 487 transitions. [2021-08-21 17:43:22,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 487 transitions. [2021-08-21 17:43:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:22,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:22,036 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:22,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:22,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 17:43:22,249 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash 561650320, now seen corresponding path program 61 times [2021-08-21 17:43:22,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:22,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872118275] [2021-08-21 17:43:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:22,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:22,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:22,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872118275] [2021-08-21 17:43:22,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872118275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:22,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497622122] [2021-08-21 17:43:22,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:22,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:22,297 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:22,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 17:43:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:22,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:22,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497622122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:22,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:22,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:22,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430065230] [2021-08-21 17:43:22,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:22,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:22,845 INFO L87 Difference]: Start difference. First operand 205 states and 487 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:22,887 INFO L93 Difference]: Finished difference Result 300 states and 671 transitions. [2021-08-21 17:43:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:43:22,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:22,888 INFO L225 Difference]: With dead ends: 300 [2021-08-21 17:43:22,888 INFO L226 Difference]: Without dead ends: 300 [2021-08-21 17:43:22,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-21 17:43:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 241. [2021-08-21 17:43:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.4291666666666667) internal successors, (583), 240 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 583 transitions. [2021-08-21 17:43:22,892 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 583 transitions. Word has length 17 [2021-08-21 17:43:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:22,892 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 583 transitions. [2021-08-21 17:43:22,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 583 transitions. [2021-08-21 17:43:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:22,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:22,893 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:22,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 17:43:23,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:23,097 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:23,097 INFO L82 PathProgramCache]: Analyzing trace with hash -247696306, now seen corresponding path program 62 times [2021-08-21 17:43:23,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:23,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528930709] [2021-08-21 17:43:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:23,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:23,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:23,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528930709] [2021-08-21 17:43:23,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528930709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:23,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715094923] [2021-08-21 17:43:23,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:23,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:23,169 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:23,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 17:43:23,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:23,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:23,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715094923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:23,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:23,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:23,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845165356] [2021-08-21 17:43:23,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:23,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:23,728 INFO L87 Difference]: Start difference. First operand 241 states and 583 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:23,776 INFO L93 Difference]: Finished difference Result 281 states and 621 transitions. [2021-08-21 17:43:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:43:23,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:23,777 INFO L225 Difference]: With dead ends: 281 [2021-08-21 17:43:23,777 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 17:43:23,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:43:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 17:43:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 244. [2021-08-21 17:43:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.4156378600823047) internal successors, (587), 243 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 587 transitions. [2021-08-21 17:43:23,780 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 587 transitions. Word has length 17 [2021-08-21 17:43:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:23,781 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 587 transitions. [2021-08-21 17:43:23,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 587 transitions. [2021-08-21 17:43:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:23,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:23,781 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:23,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 17:43:23,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 17:43:23,989 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1241708690, now seen corresponding path program 63 times [2021-08-21 17:43:23,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:23,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147713398] [2021-08-21 17:43:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:23,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:24,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:24,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147713398] [2021-08-21 17:43:24,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147713398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:24,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472037570] [2021-08-21 17:43:24,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:24,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:24,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:24,042 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:24,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 17:43:24,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:43:24,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:24,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:24,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472037570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:24,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:24,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:24,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301386017] [2021-08-21 17:43:24,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:24,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:24,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:24,585 INFO L87 Difference]: Start difference. First operand 244 states and 587 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:24,631 INFO L93 Difference]: Finished difference Result 275 states and 627 transitions. [2021-08-21 17:43:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:43:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:24,632 INFO L225 Difference]: With dead ends: 275 [2021-08-21 17:43:24,632 INFO L226 Difference]: Without dead ends: 275 [2021-08-21 17:43:24,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:43:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-21 17:43:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 252. [2021-08-21 17:43:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.410358565737052) internal successors, (605), 251 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 605 transitions. [2021-08-21 17:43:24,636 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 605 transitions. Word has length 17 [2021-08-21 17:43:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:24,636 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 605 transitions. [2021-08-21 17:43:24,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 605 transitions. [2021-08-21 17:43:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:24,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:24,637 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:24,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 17:43:24,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 17:43:24,853 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash 168623310, now seen corresponding path program 64 times [2021-08-21 17:43:24,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:24,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857057732] [2021-08-21 17:43:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:24,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:24,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:24,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857057732] [2021-08-21 17:43:24,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857057732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:24,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724601010] [2021-08-21 17:43:24,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:24,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:24,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:24,903 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:24,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 17:43:25,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:25,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:25,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:25,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724601010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:25,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:25,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:43:25,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109560784] [2021-08-21 17:43:25,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:43:25,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:43:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:43:25,465 INFO L87 Difference]: Start difference. First operand 252 states and 605 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:25,507 INFO L93 Difference]: Finished difference Result 280 states and 653 transitions. [2021-08-21 17:43:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:43:25,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 17:43:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:25,508 INFO L225 Difference]: With dead ends: 280 [2021-08-21 17:43:25,508 INFO L226 Difference]: Without dead ends: 280 [2021-08-21 17:43:25,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:43:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-21 17:43:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2021-08-21 17:43:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.382899628252788) internal successors, (641), 269 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 641 transitions. [2021-08-21 17:43:25,513 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 641 transitions. Word has length 17 [2021-08-21 17:43:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:25,513 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 641 transitions. [2021-08-21 17:43:25,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 641 transitions. [2021-08-21 17:43:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:25,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:25,514 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:25,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 17:43:25,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 17:43:25,725 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1262714898, now seen corresponding path program 65 times [2021-08-21 17:43:25,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:25,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923112344] [2021-08-21 17:43:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:25,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:25,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:25,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923112344] [2021-08-21 17:43:25,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923112344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:25,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877154380] [2021-08-21 17:43:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:25,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:25,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:25,783 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:25,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 17:43:26,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:43:26,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:26,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:26,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877154380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:26,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:26,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:26,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137672503] [2021-08-21 17:43:26,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:26,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:26,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:26,344 INFO L87 Difference]: Start difference. First operand 270 states and 641 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:26,417 INFO L93 Difference]: Finished difference Result 281 states and 655 transitions. [2021-08-21 17:43:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:43:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:26,418 INFO L225 Difference]: With dead ends: 281 [2021-08-21 17:43:26,419 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 17:43:26,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:43:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 17:43:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2021-08-21 17:43:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.387218045112782) internal successors, (635), 266 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 635 transitions. [2021-08-21 17:43:26,422 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 635 transitions. Word has length 17 [2021-08-21 17:43:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:26,422 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 635 transitions. [2021-08-21 17:43:26,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 635 transitions. [2021-08-21 17:43:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:26,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:26,422 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:26,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 17:43:26,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 17:43:26,623 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash 819815758, now seen corresponding path program 66 times [2021-08-21 17:43:26,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:26,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573839849] [2021-08-21 17:43:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:26,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:26,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:26,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573839849] [2021-08-21 17:43:26,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573839849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:26,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643369803] [2021-08-21 17:43:26,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:26,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:26,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:26,681 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:26,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 17:43:27,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:43:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:27,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:27,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643369803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:27,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:27,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:27,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334452149] [2021-08-21 17:43:27,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:27,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:27,242 INFO L87 Difference]: Start difference. First operand 267 states and 635 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:27,317 INFO L93 Difference]: Finished difference Result 280 states and 661 transitions. [2021-08-21 17:43:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:43:27,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:27,318 INFO L225 Difference]: With dead ends: 280 [2021-08-21 17:43:27,318 INFO L226 Difference]: Without dead ends: 280 [2021-08-21 17:43:27,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:43:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-21 17:43:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 267. [2021-08-21 17:43:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.387218045112782) internal successors, (635), 266 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 635 transitions. [2021-08-21 17:43:27,322 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 635 transitions. Word has length 17 [2021-08-21 17:43:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:27,322 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 635 transitions. [2021-08-21 17:43:27,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 635 transitions. [2021-08-21 17:43:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:43:27,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:27,322 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:27,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:27,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:27,523 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash -25155694, now seen corresponding path program 67 times [2021-08-21 17:43:27,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:27,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536455946] [2021-08-21 17:43:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:27,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:27,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:27,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536455946] [2021-08-21 17:43:27,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536455946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:27,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934725654] [2021-08-21 17:43:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:27,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:27,577 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:27,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 17:43:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:28,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:43:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:28,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934725654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:28,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:28,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:43:28,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505926932] [2021-08-21 17:43:28,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:43:28,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:43:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:43:28,153 INFO L87 Difference]: Start difference. First operand 267 states and 635 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:28,236 INFO L93 Difference]: Finished difference Result 322 states and 745 transitions. [2021-08-21 17:43:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:43:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 17:43:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:28,237 INFO L225 Difference]: With dead ends: 322 [2021-08-21 17:43:28,237 INFO L226 Difference]: Without dead ends: 322 [2021-08-21 17:43:28,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:43:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-21 17:43:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 275. [2021-08-21 17:43:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.375912408759124) internal successors, (651), 274 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 651 transitions. [2021-08-21 17:43:28,240 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 651 transitions. Word has length 17 [2021-08-21 17:43:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:28,241 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 651 transitions. [2021-08-21 17:43:28,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 651 transitions. [2021-08-21 17:43:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:28,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:28,241 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:28,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 17:43:28,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:28,451 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:28,451 INFO L82 PathProgramCache]: Analyzing trace with hash 782725393, now seen corresponding path program 68 times [2021-08-21 17:43:28,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:28,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211059092] [2021-08-21 17:43:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:28,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:28,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:28,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211059092] [2021-08-21 17:43:28,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211059092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:28,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729974967] [2021-08-21 17:43:28,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:28,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:28,578 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:28,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 17:43:29,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:29,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:29,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:29,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:29,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:30,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729974967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:30,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:30,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 17:43:30,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347630829] [2021-08-21 17:43:30,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:43:30,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:43:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:43:30,452 INFO L87 Difference]: Start difference. First operand 275 states and 651 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:30,705 INFO L93 Difference]: Finished difference Result 323 states and 738 transitions. [2021-08-21 17:43:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:43:30,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 18 [2021-08-21 17:43:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:30,706 INFO L225 Difference]: With dead ends: 323 [2021-08-21 17:43:30,706 INFO L226 Difference]: Without dead ends: 307 [2021-08-21 17:43:30,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:43:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-21 17:43:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 289. [2021-08-21 17:43:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.388888888888889) internal successors, (688), 288 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 688 transitions. [2021-08-21 17:43:30,710 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 688 transitions. Word has length 18 [2021-08-21 17:43:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:30,710 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 688 transitions. [2021-08-21 17:43:30,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 688 transitions. [2021-08-21 17:43:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:30,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:30,711 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:30,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 17:43:30,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:30,911 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1287785553, now seen corresponding path program 69 times [2021-08-21 17:43:30,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:30,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551942808] [2021-08-21 17:43:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:30,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:31,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:31,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551942808] [2021-08-21 17:43:31,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551942808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:31,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725681950] [2021-08-21 17:43:31,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:31,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:31,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:31,037 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:31,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 17:43:31,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:43:31,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:31,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 17:43:31,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:32,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 321 [2021-08-21 17:43:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:33,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725681950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:33,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:33,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:43:33,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192216997] [2021-08-21 17:43:33,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:43:33,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:43:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:33,685 INFO L87 Difference]: Start difference. First operand 289 states and 688 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:33,897 INFO L93 Difference]: Finished difference Result 339 states and 778 transitions. [2021-08-21 17:43:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:33,897 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:43:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:33,898 INFO L225 Difference]: With dead ends: 339 [2021-08-21 17:43:33,898 INFO L226 Difference]: Without dead ends: 328 [2021-08-21 17:43:33,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-21 17:43:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 304. [2021-08-21 17:43:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.4092409240924093) internal successors, (730), 303 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 730 transitions. [2021-08-21 17:43:33,903 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 730 transitions. Word has length 18 [2021-08-21 17:43:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:33,903 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 730 transitions. [2021-08-21 17:43:33,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 730 transitions. [2021-08-21 17:43:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:33,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:33,904 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:33,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:34,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 17:43:34,104 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1704105169, now seen corresponding path program 70 times [2021-08-21 17:43:34,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:34,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769783415] [2021-08-21 17:43:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:34,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:34,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:34,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769783415] [2021-08-21 17:43:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769783415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:34,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013206296] [2021-08-21 17:43:34,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:34,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:34,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:34,223 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:34,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 17:43:34,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:34,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:34,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:34,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:35,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:35,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:35,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013206296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:35,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:35,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:43:35,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908098065] [2021-08-21 17:43:35,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:43:35,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:43:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:35,962 INFO L87 Difference]: Start difference. First operand 304 states and 730 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:36,244 INFO L93 Difference]: Finished difference Result 371 states and 876 transitions. [2021-08-21 17:43:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:43:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:36,246 INFO L225 Difference]: With dead ends: 371 [2021-08-21 17:43:36,246 INFO L226 Difference]: Without dead ends: 360 [2021-08-21 17:43:36,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-21 17:43:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 338. [2021-08-21 17:43:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.4421364985163203) internal successors, (823), 337 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 823 transitions. [2021-08-21 17:43:36,250 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 823 transitions. Word has length 18 [2021-08-21 17:43:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:36,250 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 823 transitions. [2021-08-21 17:43:36,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 823 transitions. [2021-08-21 17:43:36,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:36,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:36,251 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:36,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:36,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:36,451 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1725111377, now seen corresponding path program 71 times [2021-08-21 17:43:36,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:36,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973738138] [2021-08-21 17:43:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:36,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:36,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:36,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973738138] [2021-08-21 17:43:36,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973738138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:36,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754691241] [2021-08-21 17:43:36,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:36,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:36,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:36,573 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:36,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 17:43:37,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:43:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:37,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:37,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:37,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:38,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754691241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:38,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:38,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:43:38,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255142764] [2021-08-21 17:43:38,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:43:38,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:38,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:43:38,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:38,353 INFO L87 Difference]: Start difference. First operand 338 states and 823 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:38,653 INFO L93 Difference]: Finished difference Result 400 states and 952 transitions. [2021-08-21 17:43:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:43:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:38,655 INFO L225 Difference]: With dead ends: 400 [2021-08-21 17:43:38,655 INFO L226 Difference]: Without dead ends: 389 [2021-08-21 17:43:38,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-21 17:43:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 367. [2021-08-21 17:43:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.4508196721311477) internal successors, (897), 366 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 897 transitions. [2021-08-21 17:43:38,659 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 897 transitions. Word has length 18 [2021-08-21 17:43:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:38,659 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 897 transitions. [2021-08-21 17:43:38,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 897 transitions. [2021-08-21 17:43:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:38,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:38,660 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:38,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:38,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:38,861 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:38,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1700027341, now seen corresponding path program 72 times [2021-08-21 17:43:38,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:38,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116460610] [2021-08-21 17:43:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:38,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:38,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:38,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116460610] [2021-08-21 17:43:38,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116460610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:38,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139438591] [2021-08-21 17:43:38,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:38,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:38,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:38,951 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:38,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 17:43:39,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:43:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:39,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:39,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:39,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:39,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:41,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139438591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:41,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:41,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-21 17:43:41,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230545897] [2021-08-21 17:43:41,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 17:43:41,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 17:43:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:43:41,683 INFO L87 Difference]: Start difference. First operand 367 states and 897 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:41,818 INFO L93 Difference]: Finished difference Result 383 states and 916 transitions. [2021-08-21 17:43:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:43:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 18 [2021-08-21 17:43:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:41,819 INFO L225 Difference]: With dead ends: 383 [2021-08-21 17:43:41,819 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 17:43:41,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 17:43:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 367. [2021-08-21 17:43:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.448087431693989) internal successors, (896), 366 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 896 transitions. [2021-08-21 17:43:41,825 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 896 transitions. Word has length 18 [2021-08-21 17:43:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:41,825 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 896 transitions. [2021-08-21 17:43:41,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 896 transitions. [2021-08-21 17:43:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:41,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:41,826 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:41,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 17:43:42,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-21 17:43:42,051 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1918663471, now seen corresponding path program 73 times [2021-08-21 17:43:42,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:42,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252200927] [2021-08-21 17:43:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:42,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:42,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:42,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252200927] [2021-08-21 17:43:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252200927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:42,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237463585] [2021-08-21 17:43:42,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:42,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:42,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:42,160 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:42,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 17:43:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:42,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:43,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:43,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:43,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237463585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:43,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:43,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:43:43,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906147321] [2021-08-21 17:43:43,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:43:43,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:43,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:43:43,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:43,921 INFO L87 Difference]: Start difference. First operand 367 states and 896 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:44,237 INFO L93 Difference]: Finished difference Result 441 states and 1052 transitions. [2021-08-21 17:43:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:43:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:44,239 INFO L225 Difference]: With dead ends: 441 [2021-08-21 17:43:44,239 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 17:43:44,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 17:43:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 406. [2021-08-21 17:43:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.4518518518518517) internal successors, (993), 405 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 993 transitions. [2021-08-21 17:43:44,244 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 993 transitions. Word has length 18 [2021-08-21 17:43:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:44,244 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 993 transitions. [2021-08-21 17:43:44,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 993 transitions. [2021-08-21 17:43:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:44,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:44,245 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:44,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 17:43:44,445 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1749968503, now seen corresponding path program 74 times [2021-08-21 17:43:44,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:44,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978000013] [2021-08-21 17:43:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:44,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:44,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:44,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978000013] [2021-08-21 17:43:44,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978000013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:44,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957843656] [2021-08-21 17:43:44,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:44,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:44,544 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:44,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 17:43:45,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:45,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:45,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:45,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:48,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957843656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:48,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:48,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 17:43:48,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247592886] [2021-08-21 17:43:48,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:43:48,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:43:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:43:48,004 INFO L87 Difference]: Start difference. First operand 406 states and 993 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:48,203 INFO L93 Difference]: Finished difference Result 427 states and 1020 transitions. [2021-08-21 17:43:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:43:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 17:43:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:48,205 INFO L225 Difference]: With dead ends: 427 [2021-08-21 17:43:48,205 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 17:43:48,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:43:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 17:43:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 406. [2021-08-21 17:43:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.449382716049383) internal successors, (992), 405 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 992 transitions. [2021-08-21 17:43:48,210 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 992 transitions. Word has length 18 [2021-08-21 17:43:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:48,210 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 992 transitions. [2021-08-21 17:43:48,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 992 transitions. [2021-08-21 17:43:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:48,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:48,210 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:48,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:48,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:48,411 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:48,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1088433233, now seen corresponding path program 75 times [2021-08-21 17:43:48,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:48,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435212209] [2021-08-21 17:43:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:48,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:48,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:48,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435212209] [2021-08-21 17:43:48,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435212209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:48,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603328166] [2021-08-21 17:43:48,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:48,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:48,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:48,533 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:48,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 17:43:49,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:43:49,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:49,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:49,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:50,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603328166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:50,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:50,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:43:50,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81167235] [2021-08-21 17:43:50,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:43:50,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:43:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:50,105 INFO L87 Difference]: Start difference. First operand 406 states and 992 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:50,362 INFO L93 Difference]: Finished difference Result 504 states and 1196 transitions. [2021-08-21 17:43:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:50,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:43:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:50,364 INFO L225 Difference]: With dead ends: 504 [2021-08-21 17:43:50,364 INFO L226 Difference]: Without dead ends: 493 [2021-08-21 17:43:50,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-21 17:43:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 476. [2021-08-21 17:43:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.4273684210526314) internal successors, (1153), 475 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1153 transitions. [2021-08-21 17:43:50,370 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1153 transitions. Word has length 18 [2021-08-21 17:43:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:50,370 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1153 transitions. [2021-08-21 17:43:50,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:50,370 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1153 transitions. [2021-08-21 17:43:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:50,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:50,371 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:50,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:50,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:50,573 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1325657267, now seen corresponding path program 76 times [2021-08-21 17:43:50,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:50,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343834687] [2021-08-21 17:43:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:50,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:50,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:50,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343834687] [2021-08-21 17:43:50,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343834687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:50,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403541309] [2021-08-21 17:43:50,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:50,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:50,713 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:50,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 17:43:51,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:51,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:51,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:51,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:55,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403541309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:55,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:55,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:43:55,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433731328] [2021-08-21 17:43:55,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:43:55,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:43:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:55,367 INFO L87 Difference]: Start difference. First operand 476 states and 1153 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:55,643 INFO L93 Difference]: Finished difference Result 499 states and 1181 transitions. [2021-08-21 17:43:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:43:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:55,645 INFO L225 Difference]: With dead ends: 499 [2021-08-21 17:43:55,645 INFO L226 Difference]: Without dead ends: 487 [2021-08-21 17:43:55,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:43:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-21 17:43:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 476. [2021-08-21 17:43:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.425263157894737) internal successors, (1152), 475 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1152 transitions. [2021-08-21 17:43:55,650 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1152 transitions. Word has length 18 [2021-08-21 17:43:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:55,650 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1152 transitions. [2021-08-21 17:43:55,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1152 transitions. [2021-08-21 17:43:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:55,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:55,651 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:55,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:55,852 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:55,852 INFO L82 PathProgramCache]: Analyzing trace with hash -180849455, now seen corresponding path program 77 times [2021-08-21 17:43:55,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:55,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340373322] [2021-08-21 17:43:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:55,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:55,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:55,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340373322] [2021-08-21 17:43:55,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340373322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:55,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385751220] [2021-08-21 17:43:55,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:55,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:55,977 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:56,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 17:43:56,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:43:56,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:56,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:43:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:57,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:43:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:43:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:59,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385751220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:59,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:59,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:43:59,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931665016] [2021-08-21 17:43:59,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:43:59,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:59,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:43:59,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:43:59,381 INFO L87 Difference]: Start difference. First operand 476 states and 1152 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:59,631 INFO L93 Difference]: Finished difference Result 567 states and 1339 transitions. [2021-08-21 17:43:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:43:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:59,633 INFO L225 Difference]: With dead ends: 567 [2021-08-21 17:43:59,633 INFO L226 Difference]: Without dead ends: 556 [2021-08-21 17:43:59,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-21 17:43:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 543. [2021-08-21 17:43:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.4095940959409594) internal successors, (1306), 542 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1306 transitions. [2021-08-21 17:43:59,639 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1306 transitions. Word has length 18 [2021-08-21 17:43:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:59,639 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1306 transitions. [2021-08-21 17:43:59,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1306 transitions. [2021-08-21 17:43:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:43:59,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:59,640 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:59,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 17:43:59,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:59,841 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:59,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1056910839, now seen corresponding path program 78 times [2021-08-21 17:43:59,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:59,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759657406] [2021-08-21 17:43:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:59,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:59,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:59,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759657406] [2021-08-21 17:43:59,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759657406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:59,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824206656] [2021-08-21 17:43:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:59,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:59,972 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:59,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 17:44:00,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:44:00,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:44:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:01,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:01,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:44:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:01,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824206656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:01,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:01,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 17:44:01,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227003211] [2021-08-21 17:44:01,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:44:01,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:44:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:44:01,586 INFO L87 Difference]: Start difference. First operand 543 states and 1306 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:02,001 INFO L93 Difference]: Finished difference Result 573 states and 1347 transitions. [2021-08-21 17:44:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:44:02,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 18 [2021-08-21 17:44:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:02,003 INFO L225 Difference]: With dead ends: 573 [2021-08-21 17:44:02,003 INFO L226 Difference]: Without dead ends: 561 [2021-08-21 17:44:02,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:44:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-21 17:44:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 543. [2021-08-21 17:44:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.407749077490775) internal successors, (1305), 542 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1305 transitions. [2021-08-21 17:44:02,010 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1305 transitions. Word has length 18 [2021-08-21 17:44:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:02,010 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1305 transitions. [2021-08-21 17:44:02,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1305 transitions. [2021-08-21 17:44:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:44:02,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:02,011 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:02,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:02,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:02,211 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash -873907119, now seen corresponding path program 79 times [2021-08-21 17:44:02,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:02,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513188045] [2021-08-21 17:44:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:02,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:02,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:02,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513188045] [2021-08-21 17:44:02,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513188045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:02,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258217406] [2021-08-21 17:44:02,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:44:02,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:02,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:02,326 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 17:44:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 17:44:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:03,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:03,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 17:44:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:05,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258217406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:05,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:05,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 17:44:05,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653128034] [2021-08-21 17:44:05,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:44:05,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:44:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:44:05,836 INFO L87 Difference]: Start difference. First operand 543 states and 1305 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:06,126 INFO L93 Difference]: Finished difference Result 632 states and 1492 transitions. [2021-08-21 17:44:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:44:06,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 18 [2021-08-21 17:44:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:06,128 INFO L225 Difference]: With dead ends: 632 [2021-08-21 17:44:06,129 INFO L226 Difference]: Without dead ends: 622 [2021-08-21 17:44:06,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:44:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-21 17:44:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 610. [2021-08-21 17:44:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 2.4022988505747125) internal successors, (1463), 609 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1463 transitions. [2021-08-21 17:44:06,138 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1463 transitions. Word has length 18 [2021-08-21 17:44:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:06,139 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1463 transitions. [2021-08-21 17:44:06,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1463 transitions. [2021-08-21 17:44:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:06,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:06,140 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:06,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:06,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-21 17:44:06,353 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:06,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:06,353 INFO L82 PathProgramCache]: Analyzing trace with hash 251186098, now seen corresponding path program 80 times [2021-08-21 17:44:06,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:06,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194649033] [2021-08-21 17:44:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:06,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:06,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:06,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194649033] [2021-08-21 17:44:06,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194649033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:06,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076451832] [2021-08-21 17:44:06,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:44:06,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:06,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:06,543 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:06,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 17:44:07,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:44:07,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:07,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:07,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:07,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:07,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:08,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076451832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:08,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:08,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 17:44:08,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549327276] [2021-08-21 17:44:08,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:44:08,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:44:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:44:08,696 INFO L87 Difference]: Start difference. First operand 610 states and 1463 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:09,011 INFO L93 Difference]: Finished difference Result 648 states and 1516 transitions. [2021-08-21 17:44:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:44:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-08-21 17:44:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:09,014 INFO L225 Difference]: With dead ends: 648 [2021-08-21 17:44:09,014 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 17:44:09,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:44:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 17:44:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 613. [2021-08-21 17:44:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.400326797385621) internal successors, (1469), 612 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1469 transitions. [2021-08-21 17:44:09,021 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1469 transitions. Word has length 19 [2021-08-21 17:44:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:09,021 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1469 transitions. [2021-08-21 17:44:09,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1469 transitions. [2021-08-21 17:44:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:09,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:09,022 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:09,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 17:44:09,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:09,223 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1809673704, now seen corresponding path program 81 times [2021-08-21 17:44:09,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:09,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848634802] [2021-08-21 17:44:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:09,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:09,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:09,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848634802] [2021-08-21 17:44:09,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848634802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:09,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502221275] [2021-08-21 17:44:09,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:44:09,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:09,406 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:09,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 17:44:10,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:44:10,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:10,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 17:44:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:10,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:10,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502221275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:11,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 17:44:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40326373] [2021-08-21 17:44:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:44:11,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:44:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:44:11,593 INFO L87 Difference]: Start difference. First operand 613 states and 1469 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:11,936 INFO L93 Difference]: Finished difference Result 647 states and 1517 transitions. [2021-08-21 17:44:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:44:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-08-21 17:44:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:11,938 INFO L225 Difference]: With dead ends: 647 [2021-08-21 17:44:11,938 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 17:44:11,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:44:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 17:44:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 615. [2021-08-21 17:44:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.3876221498371337) internal successors, (1466), 614 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1466 transitions. [2021-08-21 17:44:11,946 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1466 transitions. Word has length 19 [2021-08-21 17:44:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:11,946 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1466 transitions. [2021-08-21 17:44:11,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1466 transitions. [2021-08-21 17:44:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:11,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:11,947 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:11,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:12,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:12,148 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash 756246258, now seen corresponding path program 82 times [2021-08-21 17:44:12,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:12,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342936818] [2021-08-21 17:44:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:12,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:12,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:12,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342936818] [2021-08-21 17:44:12,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342936818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:12,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830829947] [2021-08-21 17:44:12,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:44:12,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:12,323 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:12,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 17:44:13,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:44:13,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:13,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:13,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:13,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:13,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:15,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830829947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:15,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:15,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 17:44:15,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042458858] [2021-08-21 17:44:15,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:44:15,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:44:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:44:15,141 INFO L87 Difference]: Start difference. First operand 615 states and 1466 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:15,525 INFO L93 Difference]: Finished difference Result 643 states and 1506 transitions. [2021-08-21 17:44:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:44:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-08-21 17:44:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:15,527 INFO L225 Difference]: With dead ends: 643 [2021-08-21 17:44:15,527 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 17:44:15,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:44:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 17:44:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 612. [2021-08-21 17:44:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.3780687397708675) internal successors, (1453), 611 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1453 transitions. [2021-08-21 17:44:15,534 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1453 transitions. Word has length 19 [2021-08-21 17:44:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1453 transitions. [2021-08-21 17:44:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1453 transitions. [2021-08-21 17:44:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:15,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:15,535 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:15,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 17:44:15,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:15,736 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 363219248, now seen corresponding path program 83 times [2021-08-21 17:44:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:15,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421534719] [2021-08-21 17:44:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:15,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:15,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:15,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421534719] [2021-08-21 17:44:15,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421534719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:15,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121084093] [2021-08-21 17:44:15,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:44:15,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:15,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:15,806 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:15,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 17:44:16,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:44:16,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:16,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121084093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:16,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:16,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:44:16,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976033846] [2021-08-21 17:44:16,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:44:16,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:44:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:44:16,693 INFO L87 Difference]: Start difference. First operand 612 states and 1453 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:16,747 INFO L93 Difference]: Finished difference Result 700 states and 1568 transitions. [2021-08-21 17:44:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:44:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 19 [2021-08-21 17:44:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:16,750 INFO L225 Difference]: With dead ends: 700 [2021-08-21 17:44:16,750 INFO L226 Difference]: Without dead ends: 700 [2021-08-21 17:44:16,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-08-21 17:44:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 620. [2021-08-21 17:44:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.384491114701131) internal successors, (1476), 619 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1476 transitions. [2021-08-21 17:44:16,760 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1476 transitions. Word has length 19 [2021-08-21 17:44:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:16,761 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1476 transitions. [2021-08-21 17:44:16,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1476 transitions. [2021-08-21 17:44:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:16,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:16,762 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:16,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:16,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:16,969 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1193572082, now seen corresponding path program 84 times [2021-08-21 17:44:16,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:16,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091830214] [2021-08-21 17:44:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:16,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:17,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:17,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091830214] [2021-08-21 17:44:17,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091830214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:17,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340341457] [2021-08-21 17:44:17,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:44:17,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:17,122 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:17,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 17:44:17,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:44:17,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:17,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:17,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:18,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:18,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:19,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340341457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:19,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:19,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 17:44:19,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620545282] [2021-08-21 17:44:19,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:44:19,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:19,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:44:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:44:19,173 INFO L87 Difference]: Start difference. First operand 620 states and 1476 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:19,469 INFO L93 Difference]: Finished difference Result 658 states and 1540 transitions. [2021-08-21 17:44:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:44:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-08-21 17:44:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:19,471 INFO L225 Difference]: With dead ends: 658 [2021-08-21 17:44:19,471 INFO L226 Difference]: Without dead ends: 651 [2021-08-21 17:44:19,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:44:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-08-21 17:44:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 624. [2021-08-21 17:44:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.377207062600321) internal successors, (1481), 623 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1481 transitions. [2021-08-21 17:44:19,481 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1481 transitions. Word has length 19 [2021-08-21 17:44:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:19,481 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1481 transitions. [2021-08-21 17:44:19,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1481 transitions. [2021-08-21 17:44:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:19,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:19,482 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:19,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:19,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:19,683 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1873630452, now seen corresponding path program 85 times [2021-08-21 17:44:19,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:19,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984763889] [2021-08-21 17:44:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:19,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:19,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:19,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984763889] [2021-08-21 17:44:19,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984763889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:19,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751795027] [2021-08-21 17:44:19,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:44:19,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:19,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:19,747 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:19,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 17:44:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:20,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751795027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:20,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:20,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:44:20,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880271490] [2021-08-21 17:44:20,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:44:20,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:44:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:20,741 INFO L87 Difference]: Start difference. First operand 624 states and 1481 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:20,818 INFO L93 Difference]: Finished difference Result 738 states and 1642 transitions. [2021-08-21 17:44:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:44:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:44:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:20,820 INFO L225 Difference]: With dead ends: 738 [2021-08-21 17:44:20,820 INFO L226 Difference]: Without dead ends: 738 [2021-08-21 17:44:20,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:44:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-08-21 17:44:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 637. [2021-08-21 17:44:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.380503144654088) internal successors, (1514), 636 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1514 transitions. [2021-08-21 17:44:20,828 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1514 transitions. Word has length 19 [2021-08-21 17:44:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:20,828 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1514 transitions. [2021-08-21 17:44:20,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1514 transitions. [2021-08-21 17:44:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:20,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:20,829 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:20,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 17:44:21,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-21 17:44:21,029 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1844764530, now seen corresponding path program 86 times [2021-08-21 17:44:21,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:21,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125063723] [2021-08-21 17:44:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:21,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:21,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:21,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125063723] [2021-08-21 17:44:21,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125063723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:21,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638001167] [2021-08-21 17:44:21,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:44:21,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:21,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:21,212 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:21,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 17:44:22,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:44:22,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:22,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:22,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:22,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:22,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:23,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638001167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:23,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:23,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:44:23,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718100152] [2021-08-21 17:44:23,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:44:23,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:44:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:44:23,319 INFO L87 Difference]: Start difference. First operand 637 states and 1514 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:23,714 INFO L93 Difference]: Finished difference Result 673 states and 1571 transitions. [2021-08-21 17:44:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:44:23,715 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-08-21 17:44:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:23,716 INFO L225 Difference]: With dead ends: 673 [2021-08-21 17:44:23,716 INFO L226 Difference]: Without dead ends: 665 [2021-08-21 17:44:23,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:44:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-21 17:44:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 639. [2021-08-21 17:44:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.3683385579937304) internal successors, (1511), 638 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1511 transitions. [2021-08-21 17:44:23,723 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1511 transitions. Word has length 19 [2021-08-21 17:44:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:23,724 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1511 transitions. [2021-08-21 17:44:23,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1511 transitions. [2021-08-21 17:44:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:23,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:23,725 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:23,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:23,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:23,944 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1451737520, now seen corresponding path program 87 times [2021-08-21 17:44:23,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:23,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781855808] [2021-08-21 17:44:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:23,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:24,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:24,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781855808] [2021-08-21 17:44:24,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781855808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:24,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360878535] [2021-08-21 17:44:24,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:44:24,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:24,002 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:24,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 17:44:25,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:44:25,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:25,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:25,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:25,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360878535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:25,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:25,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:44:25,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225807608] [2021-08-21 17:44:25,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:44:25,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:44:25,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:25,132 INFO L87 Difference]: Start difference. First operand 639 states and 1511 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:25,215 INFO L93 Difference]: Finished difference Result 1023 states and 2370 transitions. [2021-08-21 17:44:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:44:25,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:44:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:25,217 INFO L225 Difference]: With dead ends: 1023 [2021-08-21 17:44:25,217 INFO L226 Difference]: Without dead ends: 1023 [2021-08-21 17:44:25,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:44:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-08-21 17:44:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 921. [2021-08-21 17:44:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 2.398913043478261) internal successors, (2207), 920 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2207 transitions. [2021-08-21 17:44:25,232 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2207 transitions. Word has length 19 [2021-08-21 17:44:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:25,233 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 2207 transitions. [2021-08-21 17:44:25,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2207 transitions. [2021-08-21 17:44:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:25,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:25,234 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:25,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:25,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:25,443 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash 556893938, now seen corresponding path program 88 times [2021-08-21 17:44:25,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:25,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376355440] [2021-08-21 17:44:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:25,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:25,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:25,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376355440] [2021-08-21 17:44:25,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376355440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:25,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694344893] [2021-08-21 17:44:25,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:44:25,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:25,629 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:25,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 17:44:26,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:44:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:26,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:26,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:27,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694344893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:27,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:27,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:44:27,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427552763] [2021-08-21 17:44:27,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:44:27,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:44:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:44:27,920 INFO L87 Difference]: Start difference. First operand 921 states and 2207 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:28,277 INFO L93 Difference]: Finished difference Result 945 states and 2242 transitions. [2021-08-21 17:44:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:44:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-08-21 17:44:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:28,279 INFO L225 Difference]: With dead ends: 945 [2021-08-21 17:44:28,279 INFO L226 Difference]: Without dead ends: 937 [2021-08-21 17:44:28,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:44:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-08-21 17:44:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 919. [2021-08-21 17:44:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3845315904139435) internal successors, (2189), 918 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2189 transitions. [2021-08-21 17:44:28,290 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2189 transitions. Word has length 19 [2021-08-21 17:44:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:28,290 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2189 transitions. [2021-08-21 17:44:28,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2189 transitions. [2021-08-21 17:44:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:28,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:28,291 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:28,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 17:44:28,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:28,492 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -252452688, now seen corresponding path program 89 times [2021-08-21 17:44:28,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:28,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880571051] [2021-08-21 17:44:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:28,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:28,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:28,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880571051] [2021-08-21 17:44:28,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880571051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:28,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008982626] [2021-08-21 17:44:28,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:44:28,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:28,552 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:28,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 17:44:29,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:44:29,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:29,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:29,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:29,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008982626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:29,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:29,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:44:29,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243562431] [2021-08-21 17:44:29,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:44:29,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:44:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:44:29,538 INFO L87 Difference]: Start difference. First operand 919 states and 2189 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:29,582 INFO L93 Difference]: Finished difference Result 1030 states and 2374 transitions. [2021-08-21 17:44:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:44:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 19 [2021-08-21 17:44:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:29,584 INFO L225 Difference]: With dead ends: 1030 [2021-08-21 17:44:29,584 INFO L226 Difference]: Without dead ends: 1030 [2021-08-21 17:44:29,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-08-21 17:44:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 962. [2021-08-21 17:44:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 2.3870967741935485) internal successors, (2294), 961 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2294 transitions. [2021-08-21 17:44:29,594 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2294 transitions. Word has length 19 [2021-08-21 17:44:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:29,595 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 2294 transitions. [2021-08-21 17:44:29,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2294 transitions. [2021-08-21 17:44:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:29,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:29,596 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:29,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:29,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:29,797 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1236952308, now seen corresponding path program 90 times [2021-08-21 17:44:29,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:29,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038853341] [2021-08-21 17:44:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:29,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:29,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:29,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038853341] [2021-08-21 17:44:29,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038853341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:29,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594215108] [2021-08-21 17:44:29,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:44:29,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:29,860 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:29,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 17:44:30,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:44:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:30,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594215108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:30,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:30,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:44:30,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109666980] [2021-08-21 17:44:30,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:44:30,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:44:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:30,866 INFO L87 Difference]: Start difference. First operand 962 states and 2294 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:30,934 INFO L93 Difference]: Finished difference Result 1075 states and 2450 transitions. [2021-08-21 17:44:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:44:30,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:44:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:30,936 INFO L225 Difference]: With dead ends: 1075 [2021-08-21 17:44:30,936 INFO L226 Difference]: Without dead ends: 1075 [2021-08-21 17:44:30,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:44:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-08-21 17:44:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 892. [2021-08-21 17:44:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.3737373737373737) internal successors, (2115), 891 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2115 transitions. [2021-08-21 17:44:30,947 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2115 transitions. Word has length 19 [2021-08-21 17:44:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:30,948 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2115 transitions. [2021-08-21 17:44:30,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2115 transitions. [2021-08-21 17:44:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:30,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:30,949 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:30,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:31,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:31,176 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash 163866928, now seen corresponding path program 91 times [2021-08-21 17:44:31,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:31,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663818381] [2021-08-21 17:44:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:31,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:31,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:31,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663818381] [2021-08-21 17:44:31,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663818381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:31,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252182153] [2021-08-21 17:44:31,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:44:31,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:31,245 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:31,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 17:44:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:32,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:32,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252182153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:32,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:32,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:44:32,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594266457] [2021-08-21 17:44:32,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:44:32,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:44:32,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:32,254 INFO L87 Difference]: Start difference. First operand 892 states and 2115 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:32,320 INFO L93 Difference]: Finished difference Result 1411 states and 3295 transitions. [2021-08-21 17:44:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:44:32,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:44:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:32,322 INFO L225 Difference]: With dead ends: 1411 [2021-08-21 17:44:32,322 INFO L226 Difference]: Without dead ends: 1411 [2021-08-21 17:44:32,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:44:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-08-21 17:44:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1339. [2021-08-21 17:44:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 2.384902840059791) internal successors, (3191), 1338 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3191 transitions. [2021-08-21 17:44:32,337 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3191 transitions. Word has length 19 [2021-08-21 17:44:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:32,338 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 3191 transitions. [2021-08-21 17:44:32,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3191 transitions. [2021-08-21 17:44:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:32,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:32,339 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:32,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:32,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-21 17:44:32,540 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1257958516, now seen corresponding path program 92 times [2021-08-21 17:44:32,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:32,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894409950] [2021-08-21 17:44:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:32,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:32,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:32,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894409950] [2021-08-21 17:44:32,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894409950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:32,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866613160] [2021-08-21 17:44:32,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:44:32,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:32,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:32,601 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:32,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 17:44:33,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:44:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:33,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:33,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866613160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:33,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:33,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:44:33,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356625723] [2021-08-21 17:44:33,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:44:33,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:44:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:33,592 INFO L87 Difference]: Start difference. First operand 1339 states and 3191 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:33,713 INFO L93 Difference]: Finished difference Result 1707 states and 3979 transitions. [2021-08-21 17:44:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:44:33,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:44:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:33,717 INFO L225 Difference]: With dead ends: 1707 [2021-08-21 17:44:33,717 INFO L226 Difference]: Without dead ends: 1707 [2021-08-21 17:44:33,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:44:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-08-21 17:44:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1561. [2021-08-21 17:44:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.383974358974359) internal successors, (3719), 1560 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 3719 transitions. [2021-08-21 17:44:33,739 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 3719 transitions. Word has length 19 [2021-08-21 17:44:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:33,739 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 3719 transitions. [2021-08-21 17:44:33,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 3719 transitions. [2021-08-21 17:44:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:33,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:33,741 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:33,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:33,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 17:44:33,942 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash 794117972, now seen corresponding path program 93 times [2021-08-21 17:44:33,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:33,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559086996] [2021-08-21 17:44:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:33,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:44:34,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:34,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559086996] [2021-08-21 17:44:34,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559086996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:34,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812945566] [2021-08-21 17:44:34,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:44:34,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:34,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:34,082 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:34,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 17:44:35,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:44:35,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:35,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:35,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:35,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:36,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812945566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:36,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:36,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-21 17:44:36,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832870676] [2021-08-21 17:44:36,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:44:36,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:36,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:44:36,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:44:36,268 INFO L87 Difference]: Start difference. First operand 1561 states and 3719 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:36,508 INFO L93 Difference]: Finished difference Result 1580 states and 3747 transitions. [2021-08-21 17:44:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:44:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 19 [2021-08-21 17:44:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:36,510 INFO L225 Difference]: With dead ends: 1580 [2021-08-21 17:44:36,510 INFO L226 Difference]: Without dead ends: 1572 [2021-08-21 17:44:36,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:44:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-08-21 17:44:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1561. [2021-08-21 17:44:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.3833333333333333) internal successors, (3718), 1560 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 3718 transitions. [2021-08-21 17:44:36,528 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 3718 transitions. Word has length 19 [2021-08-21 17:44:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:36,528 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 3718 transitions. [2021-08-21 17:44:36,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 3718 transitions. [2021-08-21 17:44:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:36,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:36,529 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:36,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 17:44:36,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:36,730 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash -934929362, now seen corresponding path program 94 times [2021-08-21 17:44:36,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:36,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24305632] [2021-08-21 17:44:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:36,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:44:36,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24305632] [2021-08-21 17:44:36,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24305632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122084916] [2021-08-21 17:44:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:44:36,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:36,886 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:36,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 17:44:37,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:44:37,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:37,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:38,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:38,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122084916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:38,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:38,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-21 17:44:38,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562562968] [2021-08-21 17:44:38,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:44:38,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:38,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:44:38,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:44:38,926 INFO L87 Difference]: Start difference. First operand 1561 states and 3718 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:39,182 INFO L93 Difference]: Finished difference Result 1582 states and 3753 transitions. [2021-08-21 17:44:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:44:39,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 19 [2021-08-21 17:44:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:39,185 INFO L225 Difference]: With dead ends: 1582 [2021-08-21 17:44:39,185 INFO L226 Difference]: Without dead ends: 1576 [2021-08-21 17:44:39,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:44:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-08-21 17:44:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1561. [2021-08-21 17:44:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.3833333333333333) internal successors, (3718), 1560 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 3718 transitions. [2021-08-21 17:44:39,212 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 3718 transitions. Word has length 19 [2021-08-21 17:44:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:39,212 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 3718 transitions. [2021-08-21 17:44:39,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 3718 transitions. [2021-08-21 17:44:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:39,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:39,214 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:39,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:39,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:39,430 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash -712388750, now seen corresponding path program 95 times [2021-08-21 17:44:39,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:39,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128712180] [2021-08-21 17:44:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:39,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:39,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:39,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128712180] [2021-08-21 17:44:39,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128712180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:39,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233177860] [2021-08-21 17:44:39,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:44:39,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:39,629 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:39,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 17:44:40,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:44:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:40,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:41,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:41,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:42,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233177860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:42,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:42,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:44:42,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957460972] [2021-08-21 17:44:42,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:44:42,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:44:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:44:42,035 INFO L87 Difference]: Start difference. First operand 1561 states and 3718 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:42,368 INFO L93 Difference]: Finished difference Result 1584 states and 3753 transitions. [2021-08-21 17:44:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:44:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-08-21 17:44:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:42,370 INFO L225 Difference]: With dead ends: 1584 [2021-08-21 17:44:42,370 INFO L226 Difference]: Without dead ends: 1577 [2021-08-21 17:44:42,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:44:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-08-21 17:44:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1561. [2021-08-21 17:44:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.378846153846154) internal successors, (3711), 1560 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 3711 transitions. [2021-08-21 17:44:42,392 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 3711 transitions. Word has length 19 [2021-08-21 17:44:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:42,392 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 3711 transitions. [2021-08-21 17:44:42,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 3711 transitions. [2021-08-21 17:44:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:42,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:42,394 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:42,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 17:44:42,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 17:44:42,609 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash -32330380, now seen corresponding path program 96 times [2021-08-21 17:44:42,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:42,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884393386] [2021-08-21 17:44:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:42,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:42,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:42,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884393386] [2021-08-21 17:44:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884393386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:42,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038288051] [2021-08-21 17:44:42,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:44:42,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:42,681 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:42,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 17:44:43,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:44:43,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:43,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:43,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:43,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038288051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:43,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:43,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:44:43,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254921856] [2021-08-21 17:44:43,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:44:43,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:44:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:43,904 INFO L87 Difference]: Start difference. First operand 1561 states and 3711 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:43,963 INFO L93 Difference]: Finished difference Result 1624 states and 3754 transitions. [2021-08-21 17:44:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:44:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:44:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:43,966 INFO L225 Difference]: With dead ends: 1624 [2021-08-21 17:44:43,966 INFO L226 Difference]: Without dead ends: 1624 [2021-08-21 17:44:43,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:44:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-08-21 17:44:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1520. [2021-08-21 17:44:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 2.369980250164582) internal successors, (3600), 1519 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 3600 transitions. [2021-08-21 17:44:43,992 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 3600 transitions. Word has length 19 [2021-08-21 17:44:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:43,992 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 3600 transitions. [2021-08-21 17:44:43,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 3600 transitions. [2021-08-21 17:44:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:43,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:43,994 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:44,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:44,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:44,221 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1105415760, now seen corresponding path program 97 times [2021-08-21 17:44:44,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:44,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924295128] [2021-08-21 17:44:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:44,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:44,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:44,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924295128] [2021-08-21 17:44:44,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924295128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:44,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389317944] [2021-08-21 17:44:44,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:44:44,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:44,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:44,286 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:44,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 17:44:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:45,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:45,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389317944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:45,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:45,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:44:45,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405649344] [2021-08-21 17:44:45,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:44:45,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:44:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:44:45,353 INFO L87 Difference]: Start difference. First operand 1520 states and 3600 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:45,437 INFO L93 Difference]: Finished difference Result 1693 states and 3860 transitions. [2021-08-21 17:44:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:44:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:44:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:45,439 INFO L225 Difference]: With dead ends: 1693 [2021-08-21 17:44:45,439 INFO L226 Difference]: Without dead ends: 1693 [2021-08-21 17:44:45,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:44:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-08-21 17:44:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 963. [2021-08-21 17:44:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 2.3523908523908523) internal successors, (2263), 962 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2263 transitions. [2021-08-21 17:44:45,459 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2263 transitions. Word has length 19 [2021-08-21 17:44:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:45,460 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 2263 transitions. [2021-08-21 17:44:45,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2263 transitions. [2021-08-21 17:44:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:45,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:45,461 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:45,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:45,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:45,680 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash -11324172, now seen corresponding path program 98 times [2021-08-21 17:44:45,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:45,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813078296] [2021-08-21 17:44:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:45,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:45,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:45,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813078296] [2021-08-21 17:44:45,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813078296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:45,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780295046] [2021-08-21 17:44:45,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:44:45,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:45,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:45,739 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:45,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 17:44:46,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:44:46,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:46,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:46,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780295046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:46,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:46,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:44:46,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854601529] [2021-08-21 17:44:46,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:44:46,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:46,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:44:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:44:46,793 INFO L87 Difference]: Start difference. First operand 963 states and 2263 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:46,870 INFO L93 Difference]: Finished difference Result 1347 states and 3103 transitions. [2021-08-21 17:44:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:44:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:44:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:46,872 INFO L225 Difference]: With dead ends: 1347 [2021-08-21 17:44:46,872 INFO L226 Difference]: Without dead ends: 1347 [2021-08-21 17:44:46,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:44:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-08-21 17:44:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1139. [2021-08-21 17:44:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 2.34622144112478) internal successors, (2670), 1138 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 2670 transitions. [2021-08-21 17:44:46,885 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 2670 transitions. Word has length 19 [2021-08-21 17:44:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:46,885 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 2670 transitions. [2021-08-21 17:44:46,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 2670 transitions. [2021-08-21 17:44:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:46,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:46,886 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:46,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 17:44:47,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 17:44:47,087 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -454223312, now seen corresponding path program 99 times [2021-08-21 17:44:47,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:47,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653805994] [2021-08-21 17:44:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:47,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:47,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:47,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653805994] [2021-08-21 17:44:47,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653805994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:47,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941537806] [2021-08-21 17:44:47,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:44:47,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:47,147 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:47,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 17:44:48,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:44:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:48,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941537806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:48,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:48,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:44:48,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467648475] [2021-08-21 17:44:48,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:44:48,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:44:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:44:48,227 INFO L87 Difference]: Start difference. First operand 1139 states and 2670 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:48,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:48,380 INFO L93 Difference]: Finished difference Result 1447 states and 3295 transitions. [2021-08-21 17:44:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:44:48,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:44:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:48,381 INFO L225 Difference]: With dead ends: 1447 [2021-08-21 17:44:48,381 INFO L226 Difference]: Without dead ends: 1447 [2021-08-21 17:44:48,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:44:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-08-21 17:44:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1278. [2021-08-21 17:44:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 2.3343774471417387) internal successors, (2981), 1277 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 2981 transitions. [2021-08-21 17:44:48,395 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 2981 transitions. Word has length 19 [2021-08-21 17:44:48,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:48,395 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 2981 transitions. [2021-08-21 17:44:48,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 2981 transitions. [2021-08-21 17:44:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:48,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:48,397 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:48,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:48,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 17:44:48,605 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash 525371544, now seen corresponding path program 100 times [2021-08-21 17:44:48,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:48,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031657107] [2021-08-21 17:44:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:48,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:48,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:48,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031657107] [2021-08-21 17:44:48,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031657107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:48,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659373497] [2021-08-21 17:44:48,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:44:48,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:48,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:48,755 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:48,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 17:44:49,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:44:49,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:49,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:49,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:50,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:50,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:51,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659373497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:51,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:51,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 17:44:51,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197280734] [2021-08-21 17:44:51,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:44:51,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:44:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:44:51,157 INFO L87 Difference]: Start difference. First operand 1278 states and 2981 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 17:44:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:51,426 INFO L93 Difference]: Finished difference Result 1295 states and 3003 transitions. [2021-08-21 17:44:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:44:51,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 17:44:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:51,428 INFO L225 Difference]: With dead ends: 1295 [2021-08-21 17:44:51,428 INFO L226 Difference]: Without dead ends: 1287 [2021-08-21 17:44:51,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:44:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-08-21 17:44:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1278. [2021-08-21 17:44:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 2.3335943617854347) internal successors, (2980), 1277 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 2980 transitions. [2021-08-21 17:44:51,441 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 2980 transitions. Word has length 19 [2021-08-21 17:44:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:51,441 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 2980 transitions. [2021-08-21 17:44:51,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 17:44:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 2980 transitions. [2021-08-21 17:44:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:51,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:51,442 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:51,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 17:44:51,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:51,643 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1203675790, now seen corresponding path program 101 times [2021-08-21 17:44:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:51,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635561977] [2021-08-21 17:44:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:51,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:51,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:51,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635561977] [2021-08-21 17:44:51,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635561977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:51,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879672513] [2021-08-21 17:44:51,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:44:51,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:51,861 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:51,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 17:44:52,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:44:52,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:52,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:53,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:53,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:54,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879672513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:54,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:54,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 17:44:54,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883773459] [2021-08-21 17:44:54,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:44:54,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:44:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:44:54,112 INFO L87 Difference]: Start difference. First operand 1278 states and 2980 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 17:44:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:54,492 INFO L93 Difference]: Finished difference Result 1298 states and 3011 transitions. [2021-08-21 17:44:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:44:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 17:44:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:54,494 INFO L225 Difference]: With dead ends: 1298 [2021-08-21 17:44:54,494 INFO L226 Difference]: Without dead ends: 1292 [2021-08-21 17:44:54,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:44:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-08-21 17:44:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1278. [2021-08-21 17:44:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 2.3335943617854347) internal successors, (2980), 1277 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 2980 transitions. [2021-08-21 17:44:54,508 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 2980 transitions. Word has length 19 [2021-08-21 17:44:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:54,508 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 2980 transitions. [2021-08-21 17:44:54,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 17:44:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 2980 transitions. [2021-08-21 17:44:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:54,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:54,510 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:54,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 17:44:54,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:54,710 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:54,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1405446414, now seen corresponding path program 102 times [2021-08-21 17:44:54,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:54,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034866876] [2021-08-21 17:44:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:54,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:54,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:54,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034866876] [2021-08-21 17:44:54,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034866876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:54,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677834600] [2021-08-21 17:44:54,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:44:54,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:54,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:54,902 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:54,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 17:44:55,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:44:55,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:55,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:44:55,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:56,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:56,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:44:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:57,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677834600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:57,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:57,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:44:57,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789229958] [2021-08-21 17:44:57,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:44:57,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:44:57,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:44:57,456 INFO L87 Difference]: Start difference. First operand 1278 states and 2980 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:57,821 INFO L93 Difference]: Finished difference Result 1294 states and 3003 transitions. [2021-08-21 17:44:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:44:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-08-21 17:44:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:57,823 INFO L225 Difference]: With dead ends: 1294 [2021-08-21 17:44:57,823 INFO L226 Difference]: Without dead ends: 1288 [2021-08-21 17:44:57,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:44:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-08-21 17:44:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1278. [2021-08-21 17:44:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 2.3328112764291307) internal successors, (2979), 1277 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 2979 transitions. [2021-08-21 17:44:57,836 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 2979 transitions. Word has length 19 [2021-08-21 17:44:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:57,836 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 2979 transitions. [2021-08-21 17:44:57,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 2979 transitions. [2021-08-21 17:44:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:57,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:57,837 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:57,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:58,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 17:44:58,038 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1798473424, now seen corresponding path program 103 times [2021-08-21 17:44:58,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:58,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643971149] [2021-08-21 17:44:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:58,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:58,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643971149] [2021-08-21 17:44:58,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643971149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91183918] [2021-08-21 17:44:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:44:58,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:58,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:58,114 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:58,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 17:44:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:59,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:44:59,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:44:59,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91183918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:59,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:59,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:44:59,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965657285] [2021-08-21 17:44:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:44:59,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:59,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:44:59,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:44:59,282 INFO L87 Difference]: Start difference. First operand 1278 states and 2979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:59,334 INFO L93 Difference]: Finished difference Result 1920 states and 4410 transitions. [2021-08-21 17:44:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:44:59,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:44:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:59,336 INFO L225 Difference]: With dead ends: 1920 [2021-08-21 17:44:59,336 INFO L226 Difference]: Without dead ends: 1920 [2021-08-21 17:44:59,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:44:59,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-08-21 17:44:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1863. [2021-08-21 17:44:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.3200859291084854) internal successors, (4320), 1862 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 4320 transitions. [2021-08-21 17:44:59,363 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 4320 transitions. Word has length 19 [2021-08-21 17:44:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:59,363 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 4320 transitions. [2021-08-21 17:44:59,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 4320 transitions. [2021-08-21 17:44:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:59,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:59,365 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:59,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 17:44:59,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 17:44:59,565 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:59,566 INFO L82 PathProgramCache]: Analyzing trace with hash -704381836, now seen corresponding path program 104 times [2021-08-21 17:44:59,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:59,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015057496] [2021-08-21 17:44:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:59,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:59,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:59,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015057496] [2021-08-21 17:44:59,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015057496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:59,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650740328] [2021-08-21 17:44:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:44:59,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:59,651 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:59,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 17:45:00,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:00,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:00,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650740328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:00,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:00,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:00,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791770393] [2021-08-21 17:45:00,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:00,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:00,813 INFO L87 Difference]: Start difference. First operand 1863 states and 4320 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:00,911 INFO L93 Difference]: Finished difference Result 1967 states and 4503 transitions. [2021-08-21 17:45:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:45:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:45:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:00,913 INFO L225 Difference]: With dead ends: 1967 [2021-08-21 17:45:00,913 INFO L226 Difference]: Without dead ends: 1967 [2021-08-21 17:45:00,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:45:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-08-21 17:45:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1836. [2021-08-21 17:45:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 2.3220708446866487) internal successors, (4261), 1835 states have internal predecessors, (4261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 4261 transitions. [2021-08-21 17:45:00,933 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 4261 transitions. Word has length 19 [2021-08-21 17:45:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:00,933 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 4261 transitions. [2021-08-21 17:45:00,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 4261 transitions. [2021-08-21 17:45:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:00,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:00,935 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:00,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:01,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:01,135 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1147280976, now seen corresponding path program 105 times [2021-08-21 17:45:01,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:01,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75888002] [2021-08-21 17:45:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:01,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:01,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:01,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75888002] [2021-08-21 17:45:01,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75888002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:01,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301854168] [2021-08-21 17:45:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:01,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:01,205 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:01,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 17:45:02,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:45:02,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:02,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301854168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:02,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:02,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:02,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530349424] [2021-08-21 17:45:02,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:02,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:02,388 INFO L87 Difference]: Start difference. First operand 1836 states and 4261 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:02,502 INFO L93 Difference]: Finished difference Result 1957 states and 4503 transitions. [2021-08-21 17:45:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:45:02,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:45:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:02,504 INFO L225 Difference]: With dead ends: 1957 [2021-08-21 17:45:02,504 INFO L226 Difference]: Without dead ends: 1957 [2021-08-21 17:45:02,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:45:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-08-21 17:45:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1900. [2021-08-21 17:45:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.3154291732490786) internal successors, (4397), 1899 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 4397 transitions. [2021-08-21 17:45:02,526 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 4397 transitions. Word has length 19 [2021-08-21 17:45:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:02,527 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 4397 transitions. [2021-08-21 17:45:02,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 4397 transitions. [2021-08-21 17:45:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:02,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:02,528 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:02,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:02,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:02,729 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1992252428, now seen corresponding path program 106 times [2021-08-21 17:45:02,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:02,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854438407] [2021-08-21 17:45:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:02,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:02,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:02,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854438407] [2021-08-21 17:45:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854438407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:02,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185441461] [2021-08-21 17:45:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:45:02,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:02,805 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:02,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 17:45:03,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:45:03,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:03,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:04,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185441461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:04,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:04,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:04,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777227528] [2021-08-21 17:45:04,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:04,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:04,023 INFO L87 Difference]: Start difference. First operand 1900 states and 4397 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:04,201 INFO L93 Difference]: Finished difference Result 1987 states and 4571 transitions. [2021-08-21 17:45:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:45:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:45:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:04,204 INFO L225 Difference]: With dead ends: 1987 [2021-08-21 17:45:04,204 INFO L226 Difference]: Without dead ends: 1987 [2021-08-21 17:45:04,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:45:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-08-21 17:45:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1921. [2021-08-21 17:45:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 2.3119791666666667) internal successors, (4439), 1920 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 4439 transitions. [2021-08-21 17:45:04,226 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 4439 transitions. Word has length 19 [2021-08-21 17:45:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:04,226 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 4439 transitions. [2021-08-21 17:45:04,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 4439 transitions. [2021-08-21 17:45:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:04,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:04,228 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:04,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:04,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-21 17:45:04,428 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 784166868, now seen corresponding path program 107 times [2021-08-21 17:45:04,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:04,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951626109] [2021-08-21 17:45:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:04,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:04,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:04,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951626109] [2021-08-21 17:45:04,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951626109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:04,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805183718] [2021-08-21 17:45:04,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:45:04,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:04,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:04,617 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:04,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 17:45:05,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:45:05,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:05,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:45:05,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:06,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:45:06,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:45:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:07,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805183718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:07,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:07,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:45:07,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155319586] [2021-08-21 17:45:07,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:45:07,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:07,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:45:07,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:07,386 INFO L87 Difference]: Start difference. First operand 1921 states and 4439 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:07,727 INFO L93 Difference]: Finished difference Result 1946 states and 4478 transitions. [2021-08-21 17:45:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:45:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-08-21 17:45:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:07,730 INFO L225 Difference]: With dead ends: 1946 [2021-08-21 17:45:07,730 INFO L226 Difference]: Without dead ends: 1937 [2021-08-21 17:45:07,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:45:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-08-21 17:45:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1922. [2021-08-21 17:45:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 2.311816762103071) internal successors, (4441), 1921 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 4441 transitions. [2021-08-21 17:45:07,750 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 4441 transitions. Word has length 19 [2021-08-21 17:45:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:07,750 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 4441 transitions. [2021-08-21 17:45:07,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 4441 transitions. [2021-08-21 17:45:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:07,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:07,752 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:07,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 17:45:07,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 17:45:07,953 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:07,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash -944880466, now seen corresponding path program 108 times [2021-08-21 17:45:07,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:07,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54880648] [2021-08-21 17:45:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:07,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:08,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:08,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54880648] [2021-08-21 17:45:08,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54880648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:08,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867417260] [2021-08-21 17:45:08,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:45:08,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:08,124 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:08,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 17:45:09,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:45:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:09,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:45:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:09,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:45:09,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:45:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:10,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867417260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:10,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:10,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:45:10,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828873671] [2021-08-21 17:45:10,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:45:10,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:45:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:10,533 INFO L87 Difference]: Start difference. First operand 1922 states and 4441 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:10,921 INFO L93 Difference]: Finished difference Result 1950 states and 4489 transitions. [2021-08-21 17:45:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:45:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-08-21 17:45:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:10,924 INFO L225 Difference]: With dead ends: 1950 [2021-08-21 17:45:10,924 INFO L226 Difference]: Without dead ends: 1944 [2021-08-21 17:45:10,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:45:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-08-21 17:45:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1923. [2021-08-21 17:45:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.3116545265348596) internal successors, (4443), 1922 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 4443 transitions. [2021-08-21 17:45:10,945 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 4443 transitions. Word has length 19 [2021-08-21 17:45:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:10,945 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 4443 transitions. [2021-08-21 17:45:10,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 4443 transitions. [2021-08-21 17:45:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:10,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:10,946 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:10,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 17:45:11,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 17:45:11,148 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1415397518, now seen corresponding path program 109 times [2021-08-21 17:45:11,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:11,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604453060] [2021-08-21 17:45:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:11,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:11,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:11,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604453060] [2021-08-21 17:45:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604453060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:11,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949696374] [2021-08-21 17:45:11,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:45:11,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:11,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:11,344 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:11,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 17:45:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:12,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 17:45:12,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:12,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:45:12,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 17:45:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:14,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949696374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:14,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:14,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:45:14,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567039043] [2021-08-21 17:45:14,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:45:14,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:45:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:14,439 INFO L87 Difference]: Start difference. First operand 1923 states and 4443 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:14,804 INFO L93 Difference]: Finished difference Result 1946 states and 4480 transitions. [2021-08-21 17:45:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:45:14,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-08-21 17:45:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:14,806 INFO L225 Difference]: With dead ends: 1946 [2021-08-21 17:45:14,806 INFO L226 Difference]: Without dead ends: 1940 [2021-08-21 17:45:14,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:45:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-08-21 17:45:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1923. [2021-08-21 17:45:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.3116545265348596) internal successors, (4443), 1922 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 4443 transitions. [2021-08-21 17:45:14,827 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 4443 transitions. Word has length 19 [2021-08-21 17:45:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:14,827 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 4443 transitions. [2021-08-21 17:45:14,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 4443 transitions. [2021-08-21 17:45:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:14,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:14,829 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:14,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:15,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 17:45:15,030 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2070223152, now seen corresponding path program 110 times [2021-08-21 17:45:15,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:15,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611113308] [2021-08-21 17:45:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:15,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:15,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:15,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611113308] [2021-08-21 17:45:15,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611113308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:15,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865856437] [2021-08-21 17:45:15,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:15,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:15,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:15,086 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:15,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 17:45:16,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:16,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:16,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:45:16,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865856437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:16,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:16,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:45:16,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230221818] [2021-08-21 17:45:16,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:45:16,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:45:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:45:16,308 INFO L87 Difference]: Start difference. First operand 1923 states and 4443 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:16,385 INFO L93 Difference]: Finished difference Result 2448 states and 5523 transitions. [2021-08-21 17:45:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:45:16,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 19 [2021-08-21 17:45:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:16,388 INFO L225 Difference]: With dead ends: 2448 [2021-08-21 17:45:16,388 INFO L226 Difference]: Without dead ends: 2448 [2021-08-21 17:45:16,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:45:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-08-21 17:45:16,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2352. [2021-08-21 17:45:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.2960442364951086) internal successors, (5398), 2351 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5398 transitions. [2021-08-21 17:45:16,417 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5398 transitions. Word has length 19 [2021-08-21 17:45:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:16,418 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 5398 transitions. [2021-08-21 17:45:16,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5398 transitions. [2021-08-21 17:45:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:16,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:16,420 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:16,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:16,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:16,621 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash -735339148, now seen corresponding path program 111 times [2021-08-21 17:45:16,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:16,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923464336] [2021-08-21 17:45:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:16,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:16,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:16,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923464336] [2021-08-21 17:45:16,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923464336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:16,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261988479] [2021-08-21 17:45:16,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:16,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:16,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:16,687 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:16,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 17:45:17,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:45:17,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:17,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261988479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:17,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:45:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354051391] [2021-08-21 17:45:17,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:45:17,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:45:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:17,994 INFO L87 Difference]: Start difference. First operand 2352 states and 5398 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:18,084 INFO L93 Difference]: Finished difference Result 2480 states and 5581 transitions. [2021-08-21 17:45:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:45:18,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:45:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:18,087 INFO L225 Difference]: With dead ends: 2480 [2021-08-21 17:45:18,087 INFO L226 Difference]: Without dead ends: 2480 [2021-08-21 17:45:18,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:45:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-08-21 17:45:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2154. [2021-08-21 17:45:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 2.288434742220158) internal successors, (4927), 2153 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 4927 transitions. [2021-08-21 17:45:18,112 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 4927 transitions. Word has length 19 [2021-08-21 17:45:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:18,112 INFO L470 AbstractCegarLoop]: Abstraction has 2154 states and 4927 transitions. [2021-08-21 17:45:18,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 4927 transitions. [2021-08-21 17:45:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:18,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:18,114 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:18,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 17:45:18,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:18,315 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:18,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1808424528, now seen corresponding path program 112 times [2021-08-21 17:45:18,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:18,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743033740] [2021-08-21 17:45:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:18,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:18,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:18,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743033740] [2021-08-21 17:45:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743033740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:18,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136087524] [2021-08-21 17:45:18,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:45:18,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:18,368 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:18,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 17:45:19,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:45:19,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:19,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136087524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:19,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:19,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:45:19,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752165224] [2021-08-21 17:45:19,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:45:19,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:45:19,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:19,626 INFO L87 Difference]: Start difference. First operand 2154 states and 4927 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:19,700 INFO L93 Difference]: Finished difference Result 2702 states and 6108 transitions. [2021-08-21 17:45:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:45:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:45:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:19,703 INFO L225 Difference]: With dead ends: 2702 [2021-08-21 17:45:19,703 INFO L226 Difference]: Without dead ends: 2702 [2021-08-21 17:45:19,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:45:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2021-08-21 17:45:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2630. [2021-08-21 17:45:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 2.277672118676303) internal successors, (5988), 2629 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5988 transitions. [2021-08-21 17:45:19,732 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5988 transitions. Word has length 19 [2021-08-21 17:45:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:19,732 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 5988 transitions. [2021-08-21 17:45:19,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5988 transitions. [2021-08-21 17:45:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:19,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:19,734 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:19,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:19,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 17:45:19,934 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash -714332940, now seen corresponding path program 113 times [2021-08-21 17:45:19,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:19,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666333900] [2021-08-21 17:45:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:19,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:45:20,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:20,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666333900] [2021-08-21 17:45:20,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666333900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:20,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542751465] [2021-08-21 17:45:20,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:45:20,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:20,005 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:20,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 17:45:21,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:45:21,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:21,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:45:21,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542751465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:21,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:21,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:45:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900999802] [2021-08-21 17:45:21,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:45:21,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:45:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:21,251 INFO L87 Difference]: Start difference. First operand 2630 states and 5988 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:21,316 INFO L93 Difference]: Finished difference Result 2813 states and 6354 transitions. [2021-08-21 17:45:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:45:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-08-21 17:45:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:21,319 INFO L225 Difference]: With dead ends: 2813 [2021-08-21 17:45:21,319 INFO L226 Difference]: Without dead ends: 2813 [2021-08-21 17:45:21,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:45:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-08-21 17:45:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2777. [2021-08-21 17:45:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 2.265850144092219) internal successors, (6290), 2776 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 6290 transitions. [2021-08-21 17:45:21,353 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 6290 transitions. Word has length 19 [2021-08-21 17:45:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:21,353 INFO L470 AbstractCegarLoop]: Abstraction has 2777 states and 6290 transitions. [2021-08-21 17:45:21,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 6290 transitions. [2021-08-21 17:45:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:21,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:21,356 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:21,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:21,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:21,556 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1157232080, now seen corresponding path program 114 times [2021-08-21 17:45:21,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:21,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355216714] [2021-08-21 17:45:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:21,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:21,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:21,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355216714] [2021-08-21 17:45:21,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355216714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:21,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197335955] [2021-08-21 17:45:21,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:45:21,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:21,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:21,665 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:21,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 17:45:22,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:45:22,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:22,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197335955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:22,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:22,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:22,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511510034] [2021-08-21 17:45:22,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:22,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:22,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:22,932 INFO L87 Difference]: Start difference. First operand 2777 states and 6290 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:23,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:23,035 INFO L93 Difference]: Finished difference Result 2840 states and 6408 transitions. [2021-08-21 17:45:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:45:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:45:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:23,039 INFO L225 Difference]: With dead ends: 2840 [2021-08-21 17:45:23,039 INFO L226 Difference]: Without dead ends: 2840 [2021-08-21 17:45:23,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:45:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-08-21 17:45:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2802. [2021-08-21 17:45:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.26347732952517) internal successors, (6340), 2801 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 6340 transitions. [2021-08-21 17:45:23,089 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 6340 transitions. Word has length 19 [2021-08-21 17:45:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:23,089 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 6340 transitions. [2021-08-21 17:45:23,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 6340 transitions. [2021-08-21 17:45:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:23,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:23,092 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:23,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 17:45:23,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:23,292 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:23,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2002203532, now seen corresponding path program 115 times [2021-08-21 17:45:23,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:23,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484127041] [2021-08-21 17:45:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:23,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:23,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:23,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484127041] [2021-08-21 17:45:23,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484127041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:23,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835688119] [2021-08-21 17:45:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:45:23,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:23,355 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 17:45:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:24,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:24,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:24,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835688119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:24,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:24,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:24,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256392916] [2021-08-21 17:45:24,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:24,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:24,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:24,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:24,605 INFO L87 Difference]: Start difference. First operand 2802 states and 6340 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:24,747 INFO L93 Difference]: Finished difference Result 2888 states and 6512 transitions. [2021-08-21 17:45:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:45:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:45:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:24,751 INFO L225 Difference]: With dead ends: 2888 [2021-08-21 17:45:24,751 INFO L226 Difference]: Without dead ends: 2888 [2021-08-21 17:45:24,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2021-08-21 17:45:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2841. [2021-08-21 17:45:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.2598591549295777) internal successors, (6418), 2840 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 6418 transitions. [2021-08-21 17:45:24,787 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 6418 transitions. Word has length 19 [2021-08-21 17:45:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:24,787 INFO L470 AbstractCegarLoop]: Abstraction has 2841 states and 6418 transitions. [2021-08-21 17:45:24,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 6418 transitions. [2021-08-21 17:45:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:24,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:24,789 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:24,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 17:45:25,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-21 17:45:25,005 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1868452528, now seen corresponding path program 116 times [2021-08-21 17:45:25,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:25,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708011084] [2021-08-21 17:45:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:25,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:25,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:25,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708011084] [2021-08-21 17:45:25,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708011084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:25,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529510524] [2021-08-21 17:45:25,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:25,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:25,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:25,076 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:25,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 17:45:26,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:45:26,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:26,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529510524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:26,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:26,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:26,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207030502] [2021-08-21 17:45:26,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:26,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:26,345 INFO L87 Difference]: Start difference. First operand 2841 states and 6418 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:26,493 INFO L93 Difference]: Finished difference Result 2995 states and 6726 transitions. [2021-08-21 17:45:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:45:26,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-08-21 17:45:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:26,496 INFO L225 Difference]: With dead ends: 2995 [2021-08-21 17:45:26,496 INFO L226 Difference]: Without dead ends: 2995 [2021-08-21 17:45:26,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:45:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-08-21 17:45:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2855. [2021-08-21 17:45:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2854 states have (on average 2.2585844428871757) internal successors, (6446), 2854 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 6446 transitions. [2021-08-21 17:45:26,545 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 6446 transitions. Word has length 19 [2021-08-21 17:45:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:26,545 INFO L470 AbstractCegarLoop]: Abstraction has 2855 states and 6446 transitions. [2021-08-21 17:45:26,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:26,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 6446 transitions. [2021-08-21 17:45:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:26,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:26,549 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:26,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:26,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:26,759 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash 953337137, now seen corresponding path program 117 times [2021-08-21 17:45:26,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:26,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779660822] [2021-08-21 17:45:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:26,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:26,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:26,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779660822] [2021-08-21 17:45:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779660822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:26,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584689888] [2021-08-21 17:45:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:26,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:26,899 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:26,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 17:45:28,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:45:28,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:28,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 17:45:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:28,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:45:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 321 [2021-08-21 17:45:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:30,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584689888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:30,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:30,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 17:45:30,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043733343] [2021-08-21 17:45:30,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:45:30,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:45:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:45:30,341 INFO L87 Difference]: Start difference. First operand 2855 states and 6446 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:30,756 INFO L93 Difference]: Finished difference Result 2918 states and 6574 transitions. [2021-08-21 17:45:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:45:30,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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 20 [2021-08-21 17:45:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:30,760 INFO L225 Difference]: With dead ends: 2918 [2021-08-21 17:45:30,760 INFO L226 Difference]: Without dead ends: 2912 [2021-08-21 17:45:30,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:45:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-08-21 17:45:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2876. [2021-08-21 17:45:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2875 states have (on average 2.261913043478261) internal successors, (6503), 2875 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 6503 transitions. [2021-08-21 17:45:30,827 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 6503 transitions. Word has length 20 [2021-08-21 17:45:30,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:30,827 INFO L470 AbstractCegarLoop]: Abstraction has 2876 states and 6503 transitions. [2021-08-21 17:45:30,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 6503 transitions. [2021-08-21 17:45:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:30,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:30,834 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:30,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:31,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:31,041 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1065370287, now seen corresponding path program 118 times [2021-08-21 17:45:31,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:31,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909020596] [2021-08-21 17:45:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:31,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:31,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:31,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909020596] [2021-08-21 17:45:31,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909020596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:31,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158434015] [2021-08-21 17:45:31,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:45:31,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:31,117 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:31,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 17:45:32,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:45:32,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:32,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158434015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:32,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:45:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112374320] [2021-08-21 17:45:32,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:45:32,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:45:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:32,524 INFO L87 Difference]: Start difference. First operand 2876 states and 6503 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:32,588 INFO L93 Difference]: Finished difference Result 3102 states and 6898 transitions. [2021-08-21 17:45:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:45:32,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:45:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:32,592 INFO L225 Difference]: With dead ends: 3102 [2021-08-21 17:45:32,592 INFO L226 Difference]: Without dead ends: 3102 [2021-08-21 17:45:32,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2021-08-21 17:45:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2893. [2021-08-21 17:45:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 2.2652143845089903) internal successors, (6551), 2892 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 6551 transitions. [2021-08-21 17:45:32,644 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 6551 transitions. Word has length 20 [2021-08-21 17:45:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:32,644 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 6551 transitions. [2021-08-21 17:45:32,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 6551 transitions. [2021-08-21 17:45:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:32,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:32,648 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:32,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:32,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 17:45:32,861 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1895723121, now seen corresponding path program 119 times [2021-08-21 17:45:32,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:32,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033065320] [2021-08-21 17:45:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:32,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:33,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:33,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033065320] [2021-08-21 17:45:33,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033065320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:33,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147940943] [2021-08-21 17:45:33,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:45:33,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:33,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:33,009 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:33,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 17:45:34,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:45:34,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:45:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:34,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:45:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:45:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:36,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147940943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:36,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:36,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:45:36,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834650822] [2021-08-21 17:45:36,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:45:36,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:45:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:36,202 INFO L87 Difference]: Start difference. First operand 2893 states and 6551 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:36,522 INFO L93 Difference]: Finished difference Result 2929 states and 6610 transitions. [2021-08-21 17:45:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:45:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:45:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:36,526 INFO L225 Difference]: With dead ends: 2929 [2021-08-21 17:45:36,526 INFO L226 Difference]: Without dead ends: 2924 [2021-08-21 17:45:36,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:45:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-08-21 17:45:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2896. [2021-08-21 17:45:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 2.265284974093264) internal successors, (6558), 2895 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 6558 transitions. [2021-08-21 17:45:36,562 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 6558 transitions. Word has length 20 [2021-08-21 17:45:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:36,562 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 6558 transitions. [2021-08-21 17:45:36,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 6558 transitions. [2021-08-21 17:45:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:36,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:36,565 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:36,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:36,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:36,766 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1719185805, now seen corresponding path program 120 times [2021-08-21 17:45:36,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:36,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829737927] [2021-08-21 17:45:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:36,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:36,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:36,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829737927] [2021-08-21 17:45:36,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829737927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:36,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340799471] [2021-08-21 17:45:36,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:45:36,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:36,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:36,830 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:36,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 17:45:38,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:45:38,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:38,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340799471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:38,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:38,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:45:38,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687559198] [2021-08-21 17:45:38,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:45:38,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:45:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:38,180 INFO L87 Difference]: Start difference. First operand 2896 states and 6558 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:38,250 INFO L93 Difference]: Finished difference Result 3269 states and 7234 transitions. [2021-08-21 17:45:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:45:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:45:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:38,254 INFO L225 Difference]: With dead ends: 3269 [2021-08-21 17:45:38,254 INFO L226 Difference]: Without dead ends: 3269 [2021-08-21 17:45:38,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:45:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-08-21 17:45:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2896. [2021-08-21 17:45:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 2.265284974093264) internal successors, (6558), 2895 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 6558 transitions. [2021-08-21 17:45:38,299 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 6558 transitions. Word has length 20 [2021-08-21 17:45:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:38,299 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 6558 transitions. [2021-08-21 17:45:38,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 6558 transitions. [2021-08-21 17:45:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:38,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:38,303 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:38,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:38,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 17:45:38,529 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1748051727, now seen corresponding path program 121 times [2021-08-21 17:45:38,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:38,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381813044] [2021-08-21 17:45:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:38,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:38,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:38,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381813044] [2021-08-21 17:45:38,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381813044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:38,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237251962] [2021-08-21 17:45:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:45:38,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:38,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:38,669 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:38,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 17:45:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:45:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:40,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:45:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:45:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:42,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237251962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:42,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:42,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:45:42,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833622230] [2021-08-21 17:45:42,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:45:42,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:45:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:42,409 INFO L87 Difference]: Start difference. First operand 2896 states and 6558 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:42,734 INFO L93 Difference]: Finished difference Result 2930 states and 6616 transitions. [2021-08-21 17:45:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:45:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:45:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:42,738 INFO L225 Difference]: With dead ends: 2930 [2021-08-21 17:45:42,738 INFO L226 Difference]: Without dead ends: 2926 [2021-08-21 17:45:42,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:45:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-21 17:45:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2898. [2021-08-21 17:45:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 2.265792198826372) internal successors, (6564), 2897 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 6564 transitions. [2021-08-21 17:45:42,774 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 6564 transitions. Word has length 20 [2021-08-21 17:45:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:42,774 INFO L470 AbstractCegarLoop]: Abstraction has 2898 states and 6564 transitions. [2021-08-21 17:45:42,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 6564 transitions. [2021-08-21 17:45:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:42,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:42,777 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:42,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:42,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 17:45:42,977 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1067993357, now seen corresponding path program 122 times [2021-08-21 17:45:42,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:42,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964459502] [2021-08-21 17:45:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:42,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:43,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:43,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964459502] [2021-08-21 17:45:43,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964459502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:43,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798072334] [2021-08-21 17:45:43,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:43,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:43,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:43,043 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:43,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 17:45:44,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:44,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:44,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:44,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:44,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798072334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:44,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:44,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:45:44,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421113802] [2021-08-21 17:45:44,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:45:44,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:45:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:44,441 INFO L87 Difference]: Start difference. First operand 2898 states and 6564 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:44,515 INFO L93 Difference]: Finished difference Result 3274 states and 7248 transitions. [2021-08-21 17:45:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:45:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:45:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:44,522 INFO L225 Difference]: With dead ends: 3274 [2021-08-21 17:45:44,522 INFO L226 Difference]: Without dead ends: 3274 [2021-08-21 17:45:44,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:45:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2021-08-21 17:45:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 2883. [2021-08-21 17:45:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 2.2647467036780013) internal successors, (6527), 2882 states have internal predecessors, (6527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 6527 transitions. [2021-08-21 17:45:44,561 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 6527 transitions. Word has length 20 [2021-08-21 17:45:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:44,561 INFO L470 AbstractCegarLoop]: Abstraction has 2883 states and 6527 transitions. [2021-08-21 17:45:44,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 6527 transitions. [2021-08-21 17:45:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:44,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:44,564 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:44,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 17:45:44,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 17:45:44,769 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2141078737, now seen corresponding path program 123 times [2021-08-21 17:45:44,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:44,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900830319] [2021-08-21 17:45:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:44,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:44,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:44,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900830319] [2021-08-21 17:45:44,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900830319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:44,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410433569] [2021-08-21 17:45:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:44,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:44,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:44,836 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:44,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 17:45:46,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:45:46,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:46,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:46,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410433569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:46,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:46,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:46,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694058552] [2021-08-21 17:45:46,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:46,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:46,214 INFO L87 Difference]: Start difference. First operand 2883 states and 6527 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:45:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:46,325 INFO L93 Difference]: Finished difference Result 3496 states and 7671 transitions. [2021-08-21 17:45:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:45:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:45:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:46,331 INFO L225 Difference]: With dead ends: 3496 [2021-08-21 17:45:46,331 INFO L226 Difference]: Without dead ends: 3496 [2021-08-21 17:45:46,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:45:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-08-21 17:45:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2763. [2021-08-21 17:45:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 2.2534395365677047) internal successors, (6224), 2762 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 6224 transitions. [2021-08-21 17:45:46,378 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 6224 transitions. Word has length 20 [2021-08-21 17:45:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:46,378 INFO L470 AbstractCegarLoop]: Abstraction has 2763 states and 6224 transitions. [2021-08-21 17:45:46,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:45:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 6224 transitions. [2021-08-21 17:45:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:46,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:46,381 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:46,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 17:45:46,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:46,583 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1259044977, now seen corresponding path program 124 times [2021-08-21 17:45:46,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:46,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975312344] [2021-08-21 17:45:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:46,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:46,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:46,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975312344] [2021-08-21 17:45:46,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975312344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:46,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162479719] [2021-08-21 17:45:46,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:45:46,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:46,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:46,747 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:46,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 17:45:48,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:45:48,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:48,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:45:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:48,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:45:48,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:45:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:51,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162479719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:51,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:51,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:45:51,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716203843] [2021-08-21 17:45:51,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:45:51,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:51,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:45:51,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:51,621 INFO L87 Difference]: Start difference. First operand 2763 states and 6224 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:51,942 INFO L93 Difference]: Finished difference Result 2793 states and 6272 transitions. [2021-08-21 17:45:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:45:51,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:45:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:51,946 INFO L225 Difference]: With dead ends: 2793 [2021-08-21 17:45:51,946 INFO L226 Difference]: Without dead ends: 2788 [2021-08-21 17:45:51,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:45:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-08-21 17:45:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2762. [2021-08-21 17:45:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2761 states have (on average 2.253169141615357) internal successors, (6221), 2761 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 6221 transitions. [2021-08-21 17:45:51,984 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 6221 transitions. Word has length 20 [2021-08-21 17:45:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:51,984 INFO L470 AbstractCegarLoop]: Abstraction has 2762 states and 6221 transitions. [2021-08-21 17:45:51,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 6221 transitions. [2021-08-21 17:45:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:51,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:51,988 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:52,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:52,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:52,209 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash 449698351, now seen corresponding path program 125 times [2021-08-21 17:45:52,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:52,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17122405] [2021-08-21 17:45:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:52,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:45:52,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:52,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17122405] [2021-08-21 17:45:52,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17122405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:52,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499122233] [2021-08-21 17:45:52,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:45:52,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:52,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:52,268 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:52,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 17:45:53,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:45:53,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:53,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:45:53,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499122233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:53,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:53,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:45:53,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407567055] [2021-08-21 17:45:53,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:45:53,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:53,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:45:53,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:45:53,666 INFO L87 Difference]: Start difference. First operand 2762 states and 6221 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:53,715 INFO L93 Difference]: Finished difference Result 2850 states and 6344 transitions. [2021-08-21 17:45:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:45:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:45:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:53,718 INFO L225 Difference]: With dead ends: 2850 [2021-08-21 17:45:53,718 INFO L226 Difference]: Without dead ends: 2850 [2021-08-21 17:45:53,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-08-21 17:45:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2782. [2021-08-21 17:45:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 2.2535059331175837) internal successors, (6267), 2781 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 6267 transitions. [2021-08-21 17:45:53,749 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 6267 transitions. Word has length 20 [2021-08-21 17:45:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:53,749 INFO L470 AbstractCegarLoop]: Abstraction has 2782 states and 6267 transitions. [2021-08-21 17:45:53,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 6267 transitions. [2021-08-21 17:45:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:53,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:53,751 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:53,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:53,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 17:45:53,952 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:53,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1939103347, now seen corresponding path program 126 times [2021-08-21 17:45:53,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:53,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329681743] [2021-08-21 17:45:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:53,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:54,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:54,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329681743] [2021-08-21 17:45:54,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329681743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:54,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006694145] [2021-08-21 17:45:54,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:45:54,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:54,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:54,011 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:54,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 17:45:55,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:45:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006694145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:55,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:55,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:45:55,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35265577] [2021-08-21 17:45:55,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:45:55,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:45:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:55,419 INFO L87 Difference]: Start difference. First operand 2782 states and 6267 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:55,485 INFO L93 Difference]: Finished difference Result 2971 states and 6579 transitions. [2021-08-21 17:45:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:45:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:45:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:55,489 INFO L225 Difference]: With dead ends: 2971 [2021-08-21 17:45:55,489 INFO L226 Difference]: Without dead ends: 2971 [2021-08-21 17:45:55,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:45:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-08-21 17:45:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2766. [2021-08-21 17:45:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 2.250994575045208) internal successors, (6224), 2765 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 6224 transitions. [2021-08-21 17:45:55,521 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 6224 transitions. Word has length 20 [2021-08-21 17:45:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:55,521 INFO L470 AbstractCegarLoop]: Abstraction has 2766 states and 6224 transitions. [2021-08-21 17:45:55,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:45:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 6224 transitions. [2021-08-21 17:45:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:55,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:55,524 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:55,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 17:45:55,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2021-08-21 17:45:55,724 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash 866017967, now seen corresponding path program 127 times [2021-08-21 17:45:55,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:55,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749009515] [2021-08-21 17:45:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:55,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:55,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:55,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749009515] [2021-08-21 17:45:55,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749009515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:55,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381467372] [2021-08-21 17:45:55,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:45:55,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:55,807 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:55,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 17:45:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:57,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:57,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381467372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:57,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:57,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:57,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112061835] [2021-08-21 17:45:57,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:57,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:57,323 INFO L87 Difference]: Start difference. First operand 2766 states and 6224 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:45:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:57,441 INFO L93 Difference]: Finished difference Result 3291 states and 7200 transitions. [2021-08-21 17:45:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:45:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:45:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:57,444 INFO L225 Difference]: With dead ends: 3291 [2021-08-21 17:45:57,445 INFO L226 Difference]: Without dead ends: 3291 [2021-08-21 17:45:57,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:45:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-08-21 17:45:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2696. [2021-08-21 17:45:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.2463821892393323) internal successors, (6054), 2695 states have internal predecessors, (6054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6054 transitions. [2021-08-21 17:45:57,477 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6054 transitions. Word has length 20 [2021-08-21 17:45:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:57,477 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 6054 transitions. [2021-08-21 17:45:57,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:45:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6054 transitions. [2021-08-21 17:45:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:57,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:57,480 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:57,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:57,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:57,697 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1960109555, now seen corresponding path program 128 times [2021-08-21 17:45:57,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:57,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297412934] [2021-08-21 17:45:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:57,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:57,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:57,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297412934] [2021-08-21 17:45:57,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297412934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:57,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627568719] [2021-08-21 17:45:57,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:57,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:57,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:57,782 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:57,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 17:45:59,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:45:59,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:59,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627568719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:59,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:59,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:45:59,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695944965] [2021-08-21 17:45:59,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:59,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:59,157 INFO L87 Difference]: Start difference. First operand 2696 states and 6054 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:45:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:59,313 INFO L93 Difference]: Finished difference Result 4047 states and 8951 transitions. [2021-08-21 17:45:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:45:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:45:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:59,320 INFO L225 Difference]: With dead ends: 4047 [2021-08-21 17:45:59,320 INFO L226 Difference]: Without dead ends: 4047 [2021-08-21 17:45:59,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:45:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-08-21 17:45:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3434. [2021-08-21 17:45:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.2575007282260415) internal successors, (7750), 3433 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 7750 transitions. [2021-08-21 17:45:59,372 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 7750 transitions. Word has length 20 [2021-08-21 17:45:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 7750 transitions. [2021-08-21 17:45:59,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:45:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 7750 transitions. [2021-08-21 17:45:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:59,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:59,374 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:59,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 17:45:59,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:59,575 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:59,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1496269011, now seen corresponding path program 129 times [2021-08-21 17:45:59,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:59,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191125415] [2021-08-21 17:45:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:59,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:45:59,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:59,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191125415] [2021-08-21 17:45:59,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191125415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:59,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120105244] [2021-08-21 17:45:59,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:59,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:59,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:59,677 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:59,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 17:46:01,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:46:01,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:46:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:01,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:46:01,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:46:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:02,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120105244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:02,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:02,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-21 17:46:02,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312307530] [2021-08-21 17:46:02,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:46:02,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:46:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:46:02,688 INFO L87 Difference]: Start difference. First operand 3434 states and 7750 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:02,964 INFO L93 Difference]: Finished difference Result 3461 states and 7790 transitions. [2021-08-21 17:46:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:46:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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 20 [2021-08-21 17:46:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:02,968 INFO L225 Difference]: With dead ends: 3461 [2021-08-21 17:46:02,968 INFO L226 Difference]: Without dead ends: 3447 [2021-08-21 17:46:02,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:46:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-08-21 17:46:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 3435. [2021-08-21 17:46:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 2.257425742574257) internal successors, (7752), 3434 states have internal predecessors, (7752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 7752 transitions. [2021-08-21 17:46:03,007 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 7752 transitions. Word has length 20 [2021-08-21 17:46:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:03,007 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 7752 transitions. [2021-08-21 17:46:03,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 7752 transitions. [2021-08-21 17:46:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:03,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:03,009 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:03,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 17:46:03,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 17:46:03,210 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash -10237711, now seen corresponding path program 130 times [2021-08-21 17:46:03,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:03,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461611557] [2021-08-21 17:46:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:03,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:03,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:03,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461611557] [2021-08-21 17:46:03,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461611557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:03,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522754987] [2021-08-21 17:46:03,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:03,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:03,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:03,338 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:03,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 17:46:04,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:04,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:46:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:05,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:46:05,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:46:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:07,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522754987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:07,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:07,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:46:07,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659865383] [2021-08-21 17:46:07,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:46:07,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:46:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:46:07,369 INFO L87 Difference]: Start difference. First operand 3435 states and 7752 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:07,686 INFO L93 Difference]: Finished difference Result 3456 states and 7785 transitions. [2021-08-21 17:46:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:46:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:46:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:07,689 INFO L225 Difference]: With dead ends: 3456 [2021-08-21 17:46:07,689 INFO L226 Difference]: Without dead ends: 3451 [2021-08-21 17:46:07,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:46:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2021-08-21 17:46:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3433. [2021-08-21 17:46:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.256993006993007) internal successors, (7746), 3432 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 7746 transitions. [2021-08-21 17:46:07,728 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 7746 transitions. Word has length 20 [2021-08-21 17:46:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:07,728 INFO L470 AbstractCegarLoop]: Abstraction has 3433 states and 7746 transitions. [2021-08-21 17:46:07,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 7746 transitions. [2021-08-21 17:46:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:07,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:07,731 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:07,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:07,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 17:46:07,931 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash -819584337, now seen corresponding path program 131 times [2021-08-21 17:46:07,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:07,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860032628] [2021-08-21 17:46:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:07,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:07,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:07,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860032628] [2021-08-21 17:46:07,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860032628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:07,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382996394] [2021-08-21 17:46:07,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:07,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:07,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:07,995 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:07,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 17:46:09,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:46:09,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:09,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:09,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382996394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:09,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:09,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:46:09,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904173447] [2021-08-21 17:46:09,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:46:09,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:46:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:46:09,542 INFO L87 Difference]: Start difference. First operand 3433 states and 7746 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:09,600 INFO L93 Difference]: Finished difference Result 3608 states and 8047 transitions. [2021-08-21 17:46:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:46:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:46:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:09,604 INFO L225 Difference]: With dead ends: 3608 [2021-08-21 17:46:09,604 INFO L226 Difference]: Without dead ends: 3608 [2021-08-21 17:46:09,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2021-08-21 17:46:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3476. [2021-08-21 17:46:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 2.258705035971223) internal successors, (7849), 3475 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 7849 transitions. [2021-08-21 17:46:09,652 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 7849 transitions. Word has length 20 [2021-08-21 17:46:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:09,652 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 7849 transitions. [2021-08-21 17:46:09,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 7849 transitions. [2021-08-21 17:46:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:09,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:09,655 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:09,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 17:46:09,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 17:46:09,855 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash 669820659, now seen corresponding path program 132 times [2021-08-21 17:46:09,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:09,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443737080] [2021-08-21 17:46:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:09,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:09,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:09,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443737080] [2021-08-21 17:46:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443737080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:09,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028711133] [2021-08-21 17:46:09,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:09,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:09,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:09,913 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:09,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 17:46:11,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:46:11,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:11,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:11,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028711133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:11,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:11,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:46:11,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572245275] [2021-08-21 17:46:11,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:46:11,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:11,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:46:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:46:11,418 INFO L87 Difference]: Start difference. First operand 3476 states and 7849 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:46:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:11,478 INFO L93 Difference]: Finished difference Result 3537 states and 7903 transitions. [2021-08-21 17:46:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:46:11,479 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:46:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:11,483 INFO L225 Difference]: With dead ends: 3537 [2021-08-21 17:46:11,483 INFO L226 Difference]: Without dead ends: 3537 [2021-08-21 17:46:11,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-08-21 17:46:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3460. [2021-08-21 17:46:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 2.25701069673316) internal successors, (7807), 3459 states have internal predecessors, (7807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 7807 transitions. [2021-08-21 17:46:11,530 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 7807 transitions. Word has length 20 [2021-08-21 17:46:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:11,530 INFO L470 AbstractCegarLoop]: Abstraction has 3460 states and 7807 transitions. [2021-08-21 17:46:11,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:46:11,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 7807 transitions. [2021-08-21 17:46:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:11,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:11,533 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:11,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:11,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 17:46:11,733 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash -403264721, now seen corresponding path program 133 times [2021-08-21 17:46:11,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:11,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050591744] [2021-08-21 17:46:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:11,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:11,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:11,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050591744] [2021-08-21 17:46:11,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050591744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:11,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688154624] [2021-08-21 17:46:11,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:11,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:11,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:11,822 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:11,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 17:46:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:13,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688154624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:13,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:13,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:46:13,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788354465] [2021-08-21 17:46:13,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:46:13,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:13,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:46:13,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:13,298 INFO L87 Difference]: Start difference. First operand 3460 states and 7807 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:13,390 INFO L93 Difference]: Finished difference Result 3739 states and 8297 transitions. [2021-08-21 17:46:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:46:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:46:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:13,395 INFO L225 Difference]: With dead ends: 3739 [2021-08-21 17:46:13,395 INFO L226 Difference]: Without dead ends: 3739 [2021-08-21 17:46:13,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:46:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-08-21 17:46:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3461. [2021-08-21 17:46:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 2.2546242774566476) internal successors, (7801), 3460 states have internal predecessors, (7801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 7801 transitions. [2021-08-21 17:46:13,440 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 7801 transitions. Word has length 20 [2021-08-21 17:46:13,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:13,440 INFO L470 AbstractCegarLoop]: Abstraction has 3461 states and 7801 transitions. [2021-08-21 17:46:13,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 7801 transitions. [2021-08-21 17:46:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:13,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:13,443 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:13,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 17:46:13,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:13,643 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash 690826867, now seen corresponding path program 134 times [2021-08-21 17:46:13,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:13,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715855801] [2021-08-21 17:46:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:13,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:13,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:13,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715855801] [2021-08-21 17:46:13,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715855801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:13,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817351852] [2021-08-21 17:46:13,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:13,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:13,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:13,709 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:13,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 17:46:15,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:15,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:15,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:15,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817351852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:15,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:15,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:46:15,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101219941] [2021-08-21 17:46:15,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:46:15,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:46:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:15,198 INFO L87 Difference]: Start difference. First operand 3461 states and 7801 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:15,300 INFO L93 Difference]: Finished difference Result 4049 states and 9063 transitions. [2021-08-21 17:46:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:46:15,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:46:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:15,306 INFO L225 Difference]: With dead ends: 4049 [2021-08-21 17:46:15,306 INFO L226 Difference]: Without dead ends: 4049 [2021-08-21 17:46:15,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:46:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2021-08-21 17:46:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 3584. [2021-08-21 17:46:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.255093497069495) internal successors, (8080), 3583 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 8080 transitions. [2021-08-21 17:46:15,358 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 8080 transitions. Word has length 20 [2021-08-21 17:46:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:15,358 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 8080 transitions. [2021-08-21 17:46:15,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 8080 transitions. [2021-08-21 17:46:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:15,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:15,362 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:15,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 17:46:15,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 17:46:15,562 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:15,563 INFO L82 PathProgramCache]: Analyzing trace with hash 247927727, now seen corresponding path program 135 times [2021-08-21 17:46:15,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:15,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951458307] [2021-08-21 17:46:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:15,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:15,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:15,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951458307] [2021-08-21 17:46:15,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951458307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:15,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66715615] [2021-08-21 17:46:15,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:15,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:15,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:15,635 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:15,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 17:46:17,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:46:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:17,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66715615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:17,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:17,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:46:17,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396657313] [2021-08-21 17:46:17,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:46:17,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:46:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:17,118 INFO L87 Difference]: Start difference. First operand 3584 states and 8080 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:17,276 INFO L93 Difference]: Finished difference Result 4575 states and 10124 transitions. [2021-08-21 17:46:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:46:17,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:46:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:17,282 INFO L225 Difference]: With dead ends: 4575 [2021-08-21 17:46:17,282 INFO L226 Difference]: Without dead ends: 4575 [2021-08-21 17:46:17,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:46:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2021-08-21 17:46:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 3729. [2021-08-21 17:46:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 2.2545600858369097) internal successors, (8405), 3728 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 8405 transitions. [2021-08-21 17:46:17,327 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 8405 transitions. Word has length 20 [2021-08-21 17:46:17,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:17,328 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 8405 transitions. [2021-08-21 17:46:17,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 8405 transitions. [2021-08-21 17:46:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:17,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:17,330 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:17,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 17:46:17,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 17:46:17,530 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1227522583, now seen corresponding path program 136 times [2021-08-21 17:46:17,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:17,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406664876] [2021-08-21 17:46:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:17,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:17,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:17,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406664876] [2021-08-21 17:46:17,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406664876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:17,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89263889] [2021-08-21 17:46:17,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:17,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:17,658 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:17,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 17:46:19,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:19,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:19,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:46:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:19,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:46:19,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:46:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:21,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89263889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:21,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:21,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 17:46:21,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803526232] [2021-08-21 17:46:21,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:46:21,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:46:21,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:46:21,206 INFO L87 Difference]: Start difference. First operand 3729 states and 8405 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:21,516 INFO L93 Difference]: Finished difference Result 3764 states and 8460 transitions. [2021-08-21 17:46:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:46:21,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:46:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:21,521 INFO L225 Difference]: With dead ends: 3764 [2021-08-21 17:46:21,521 INFO L226 Difference]: Without dead ends: 3756 [2021-08-21 17:46:21,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:46:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2021-08-21 17:46:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 3729. [2021-08-21 17:46:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 2.2545600858369097) internal successors, (8405), 3728 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 8405 transitions. [2021-08-21 17:46:21,570 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 8405 transitions. Word has length 20 [2021-08-21 17:46:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:21,570 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 8405 transitions. [2021-08-21 17:46:21,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 8405 transitions. [2021-08-21 17:46:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:21,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:21,573 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:21,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 17:46:21,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:21,774 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:21,774 INFO L82 PathProgramCache]: Analyzing trace with hash 422080439, now seen corresponding path program 137 times [2021-08-21 17:46:21,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:21,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246384544] [2021-08-21 17:46:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:21,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:21,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:21,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246384544] [2021-08-21 17:46:21,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246384544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:21,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852465271] [2021-08-21 17:46:21,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:21,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:21,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:21,845 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:21,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 17:46:23,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:46:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:23,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852465271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:23,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:23,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:46:23,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293123501] [2021-08-21 17:46:23,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:46:23,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:46:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:23,360 INFO L87 Difference]: Start difference. First operand 3729 states and 8405 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:23,469 INFO L93 Difference]: Finished difference Result 4412 states and 9725 transitions. [2021-08-21 17:46:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:46:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:46:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:23,475 INFO L225 Difference]: With dead ends: 4412 [2021-08-21 17:46:23,475 INFO L226 Difference]: Without dead ends: 4412 [2021-08-21 17:46:23,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:46:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-08-21 17:46:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 1972. [2021-08-21 17:46:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1971 states have (on average 2.236935565702689) internal successors, (4409), 1971 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 4409 transitions. [2021-08-21 17:46:23,522 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 4409 transitions. Word has length 20 [2021-08-21 17:46:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:23,522 INFO L470 AbstractCegarLoop]: Abstraction has 1972 states and 4409 transitions. [2021-08-21 17:46:23,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 4409 transitions. [2021-08-21 17:46:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:23,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:23,524 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:23,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-21 17:46:23,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:23,724 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash -20818701, now seen corresponding path program 138 times [2021-08-21 17:46:23,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:23,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151564135] [2021-08-21 17:46:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:23,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:23,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:23,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151564135] [2021-08-21 17:46:23,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151564135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:23,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387634394] [2021-08-21 17:46:23,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:23,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:23,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:23,791 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:23,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 17:46:25,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:46:25,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:25,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:25,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:25,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387634394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:25,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:25,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:46:25,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294692614] [2021-08-21 17:46:25,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:46:25,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:46:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:25,296 INFO L87 Difference]: Start difference. First operand 1972 states and 4409 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:25,442 INFO L93 Difference]: Finished difference Result 3066 states and 6672 transitions. [2021-08-21 17:46:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:46:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:46:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:25,446 INFO L225 Difference]: With dead ends: 3066 [2021-08-21 17:46:25,446 INFO L226 Difference]: Without dead ends: 3066 [2021-08-21 17:46:25,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:46:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-08-21 17:46:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1958. [2021-08-21 17:46:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.245784363822177) internal successors, (4395), 1957 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 4395 transitions. [2021-08-21 17:46:25,474 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 4395 transitions. Word has length 20 [2021-08-21 17:46:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:25,474 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 4395 transitions. [2021-08-21 17:46:25,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 4395 transitions. [2021-08-21 17:46:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:25,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:25,476 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:25,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:25,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:25,677 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash -703295375, now seen corresponding path program 139 times [2021-08-21 17:46:25,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:25,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299841915] [2021-08-21 17:46:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:25,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:25,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:25,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299841915] [2021-08-21 17:46:25,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299841915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:25,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602768942] [2021-08-21 17:46:25,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:25,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:25,808 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:25,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 17:46:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:27,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:46:27,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:27,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:46:27,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:46:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:28,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602768942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:28,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:28,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:46:28,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682517159] [2021-08-21 17:46:28,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:46:28,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:46:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:46:28,827 INFO L87 Difference]: Start difference. First operand 1958 states and 4395 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:29,063 INFO L93 Difference]: Finished difference Result 1977 states and 4427 transitions. [2021-08-21 17:46:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:46:29,063 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:46:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:29,066 INFO L225 Difference]: With dead ends: 1977 [2021-08-21 17:46:29,066 INFO L226 Difference]: Without dead ends: 1973 [2021-08-21 17:46:29,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:46:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-08-21 17:46:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1958. [2021-08-21 17:46:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.245784363822177) internal successors, (4395), 1957 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 4395 transitions. [2021-08-21 17:46:29,088 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 4395 transitions. Word has length 20 [2021-08-21 17:46:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:29,088 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 4395 transitions. [2021-08-21 17:46:29,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 4395 transitions. [2021-08-21 17:46:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:29,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:29,090 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:29,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 17:46:29,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-08-21 17:46:29,291 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -23237005, now seen corresponding path program 140 times [2021-08-21 17:46:29,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:29,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693677284] [2021-08-21 17:46:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:29,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:29,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:29,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693677284] [2021-08-21 17:46:29,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693677284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:29,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590228251] [2021-08-21 17:46:29,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:29,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:29,348 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 17:46:30,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:30,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:30,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590228251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:30,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:30,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:46:30,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727058813] [2021-08-21 17:46:30,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:46:30,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:46:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:46:30,883 INFO L87 Difference]: Start difference. First operand 1958 states and 4395 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:46:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:30,961 INFO L93 Difference]: Finished difference Result 2099 states and 4618 transitions. [2021-08-21 17:46:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:46:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:46:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:30,963 INFO L225 Difference]: With dead ends: 2099 [2021-08-21 17:46:30,963 INFO L226 Difference]: Without dead ends: 2099 [2021-08-21 17:46:30,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:46:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-08-21 17:46:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1880. [2021-08-21 17:46:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.2442788717402875) internal successors, (4217), 1879 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 4217 transitions. [2021-08-21 17:46:30,983 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 4217 transitions. Word has length 20 [2021-08-21 17:46:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:30,983 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 4217 transitions. [2021-08-21 17:46:30,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:46:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 4217 transitions. [2021-08-21 17:46:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:30,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:30,985 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:31,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-21 17:46:31,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 17:46:31,186 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1096322385, now seen corresponding path program 141 times [2021-08-21 17:46:31,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:31,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823232978] [2021-08-21 17:46:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:31,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:31,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:31,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823232978] [2021-08-21 17:46:31,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823232978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:31,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077318785] [2021-08-21 17:46:31,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:31,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:31,244 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:31,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 17:46:32,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:46:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:32,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077318785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:32,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:32,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:46:32,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328763176] [2021-08-21 17:46:32,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:46:32,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:46:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:32,804 INFO L87 Difference]: Start difference. First operand 1880 states and 4217 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:32,875 INFO L93 Difference]: Finished difference Result 1933 states and 4218 transitions. [2021-08-21 17:46:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:46:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:46:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:32,878 INFO L225 Difference]: With dead ends: 1933 [2021-08-21 17:46:32,878 INFO L226 Difference]: Without dead ends: 1933 [2021-08-21 17:46:32,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:46:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-08-21 17:46:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1763. [2021-08-21 17:46:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.2309875141884223) internal successors, (3931), 1762 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 3931 transitions. [2021-08-21 17:46:32,898 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 3931 transitions. Word has length 20 [2021-08-21 17:46:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:32,899 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 3931 transitions. [2021-08-21 17:46:32,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:46:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 3931 transitions. [2021-08-21 17:46:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:32,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:32,900 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:32,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:33,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 17:46:33,101 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2230797, now seen corresponding path program 142 times [2021-08-21 17:46:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:33,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849790216] [2021-08-21 17:46:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:33,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:33,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:33,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849790216] [2021-08-21 17:46:33,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849790216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:33,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936017983] [2021-08-21 17:46:33,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:33,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:33,179 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:33,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 17:46:34,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:34,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936017983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:34,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:34,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:46:34,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794816635] [2021-08-21 17:46:34,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:46:34,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:46:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:34,906 INFO L87 Difference]: Start difference. First operand 1763 states and 3931 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:35,014 INFO L93 Difference]: Finished difference Result 2038 states and 4414 transitions. [2021-08-21 17:46:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:46:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:46:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:35,017 INFO L225 Difference]: With dead ends: 2038 [2021-08-21 17:46:35,017 INFO L226 Difference]: Without dead ends: 2038 [2021-08-21 17:46:35,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:46:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-08-21 17:46:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1302. [2021-08-21 17:46:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.2436587240584167) internal successors, (2919), 1301 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2919 transitions. [2021-08-21 17:46:35,035 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2919 transitions. Word has length 20 [2021-08-21 17:46:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:35,035 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 2919 transitions. [2021-08-21 17:46:35,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2919 transitions. [2021-08-21 17:46:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:35,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:35,036 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:35,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:35,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:35,241 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash -445129937, now seen corresponding path program 143 times [2021-08-21 17:46:35,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:35,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123037120] [2021-08-21 17:46:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:35,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:35,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:35,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123037120] [2021-08-21 17:46:35,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123037120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:35,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089961220] [2021-08-21 17:46:35,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:35,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:35,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:35,308 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:35,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 17:46:36,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:46:36,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:36,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:36,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089961220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:36,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:36,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:46:36,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972818471] [2021-08-21 17:46:36,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:46:36,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:46:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:36,868 INFO L87 Difference]: Start difference. First operand 1302 states and 2919 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:36,974 INFO L93 Difference]: Finished difference Result 1834 states and 4027 transitions. [2021-08-21 17:46:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:46:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:46:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:36,976 INFO L225 Difference]: With dead ends: 1834 [2021-08-21 17:46:36,976 INFO L226 Difference]: Without dead ends: 1834 [2021-08-21 17:46:36,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:46:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-08-21 17:46:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1296. [2021-08-21 17:46:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 2.261003861003861) internal successors, (2928), 1295 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 2928 transitions. [2021-08-21 17:46:36,992 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 2928 transitions. Word has length 20 [2021-08-21 17:46:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:36,992 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 2928 transitions. [2021-08-21 17:46:36,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 2928 transitions. [2021-08-21 17:46:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:36,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:36,993 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:37,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:37,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 17:46:37,194 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1290101389, now seen corresponding path program 144 times [2021-08-21 17:46:37,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:37,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296960338] [2021-08-21 17:46:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:37,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:37,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:37,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296960338] [2021-08-21 17:46:37,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296960338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:37,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169134169] [2021-08-21 17:46:37,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:37,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:37,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:37,263 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:37,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 17:46:38,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:46:38,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:38,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:38,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:38,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169134169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:38,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:38,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:46:38,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682563771] [2021-08-21 17:46:38,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:46:38,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:46:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:38,847 INFO L87 Difference]: Start difference. First operand 1296 states and 2928 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:39,034 INFO L93 Difference]: Finished difference Result 1915 states and 4181 transitions. [2021-08-21 17:46:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:46:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:46:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:39,037 INFO L225 Difference]: With dead ends: 1915 [2021-08-21 17:46:39,037 INFO L226 Difference]: Without dead ends: 1915 [2021-08-21 17:46:39,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:46:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-08-21 17:46:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1512. [2021-08-21 17:46:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 2.2495036399735273) internal successors, (3399), 1511 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 3399 transitions. [2021-08-21 17:46:39,054 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 3399 transitions. Word has length 20 [2021-08-21 17:46:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:39,054 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 3399 transitions. [2021-08-21 17:46:39,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 3399 transitions. [2021-08-21 17:46:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:39,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:39,055 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:39,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-21 17:46:39,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-21 17:46:39,256 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1486317907, now seen corresponding path program 145 times [2021-08-21 17:46:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:39,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992247945] [2021-08-21 17:46:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:39,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:39,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:39,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992247945] [2021-08-21 17:46:39,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992247945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:39,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921653232] [2021-08-21 17:46:39,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:39,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:39,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:39,378 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:39,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 17:46:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:40,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:46:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:41,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:46:41,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:46:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:44,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921653232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:44,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:44,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:46:44,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567613714] [2021-08-21 17:46:44,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:46:44,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:46:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:46:44,664 INFO L87 Difference]: Start difference. First operand 1512 states and 3399 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:45,070 INFO L93 Difference]: Finished difference Result 1557 states and 3474 transitions. [2021-08-21 17:46:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:46:45,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:46:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:45,072 INFO L225 Difference]: With dead ends: 1557 [2021-08-21 17:46:45,072 INFO L226 Difference]: Without dead ends: 1549 [2021-08-21 17:46:45,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:46:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-08-21 17:46:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1516. [2021-08-21 17:46:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 2.2514851485148513) internal successors, (3411), 1515 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 3411 transitions. [2021-08-21 17:46:45,088 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 3411 transitions. Word has length 20 [2021-08-21 17:46:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:45,088 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 3411 transitions. [2021-08-21 17:46:45,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 3411 transitions. [2021-08-21 17:46:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:45,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:45,089 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:45,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 17:46:45,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:45,290 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash -186334613, now seen corresponding path program 146 times [2021-08-21 17:46:45,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:45,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983740869] [2021-08-21 17:46:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:45,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:45,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:45,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983740869] [2021-08-21 17:46:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983740869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:45,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829555368] [2021-08-21 17:46:45,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:45,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:45,358 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:45,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 17:46:46,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:46,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:46,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:46,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:46,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829555368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:46,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:46,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:46:46,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27484061] [2021-08-21 17:46:46,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:46:46,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:46,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:46:46,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:46,962 INFO L87 Difference]: Start difference. First operand 1516 states and 3411 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:47,091 INFO L93 Difference]: Finished difference Result 1767 states and 3897 transitions. [2021-08-21 17:46:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:46:47,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:46:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:47,093 INFO L225 Difference]: With dead ends: 1767 [2021-08-21 17:46:47,093 INFO L226 Difference]: Without dead ends: 1767 [2021-08-21 17:46:47,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:46:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-08-21 17:46:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1213. [2021-08-21 17:46:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.2681518151815183) internal successors, (2749), 1212 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2749 transitions. [2021-08-21 17:46:47,109 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2749 transitions. Word has length 20 [2021-08-21 17:46:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:47,109 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2749 transitions. [2021-08-21 17:46:47,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2749 transitions. [2021-08-21 17:46:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:47,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:47,110 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:47,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:47,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-08-21 17:46:47,312 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1031306065, now seen corresponding path program 147 times [2021-08-21 17:46:47,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:47,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110679055] [2021-08-21 17:46:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:47,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:47,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:47,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110679055] [2021-08-21 17:46:47,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110679055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:47,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348251099] [2021-08-21 17:46:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:47,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:47,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:47,397 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:47,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 17:46:48,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:46:48,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:48,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:49,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348251099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:49,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:49,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:46:49,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104018476] [2021-08-21 17:46:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:46:49,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:46:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:49,014 INFO L87 Difference]: Start difference. First operand 1213 states and 2749 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:49,201 INFO L93 Difference]: Finished difference Result 1707 states and 3749 transitions. [2021-08-21 17:46:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:46:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:46:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:49,203 INFO L225 Difference]: With dead ends: 1707 [2021-08-21 17:46:49,203 INFO L226 Difference]: Without dead ends: 1707 [2021-08-21 17:46:49,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:46:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-08-21 17:46:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1243. [2021-08-21 17:46:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 2.2681159420289854) internal successors, (2817), 1242 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 2817 transitions. [2021-08-21 17:46:49,218 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 2817 transitions. Word has length 20 [2021-08-21 17:46:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:49,218 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 2817 transitions. [2021-08-21 17:46:49,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:46:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 2817 transitions. [2021-08-21 17:46:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:49,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:49,219 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:49,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-21 17:46:49,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:49,420 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash -713246479, now seen corresponding path program 148 times [2021-08-21 17:46:49,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:49,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895436714] [2021-08-21 17:46:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:49,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:49,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:49,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895436714] [2021-08-21 17:46:49,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895436714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:49,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28589214] [2021-08-21 17:46:49,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:49,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:49,548 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:49,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 17:46:51,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:51,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:46:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:51,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:46:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:46:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:53,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28589214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:53,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:53,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:46:53,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132200185] [2021-08-21 17:46:53,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:46:53,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:46:53,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:46:53,807 INFO L87 Difference]: Start difference. First operand 1243 states and 2817 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:54,083 INFO L93 Difference]: Finished difference Result 1264 states and 2854 transitions. [2021-08-21 17:46:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:46:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:46:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:54,085 INFO L225 Difference]: With dead ends: 1264 [2021-08-21 17:46:54,085 INFO L226 Difference]: Without dead ends: 1260 [2021-08-21 17:46:54,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:46:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-08-21 17:46:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1244. [2021-08-21 17:46:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.2687047465808527) internal successors, (2820), 1243 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 2820 transitions. [2021-08-21 17:46:54,098 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 2820 transitions. Word has length 20 [2021-08-21 17:46:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:54,098 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 2820 transitions. [2021-08-21 17:46:54,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 2820 transitions. [2021-08-21 17:46:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:54,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:54,099 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:54,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-21 17:46:54,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:54,299 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1522593105, now seen corresponding path program 149 times [2021-08-21 17:46:54,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:54,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47768243] [2021-08-21 17:46:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:54,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:54,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:54,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47768243] [2021-08-21 17:46:54,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47768243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:54,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783605433] [2021-08-21 17:46:54,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:54,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:54,377 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:54,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 17:46:55,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:46:55,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:55,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:55,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783605433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:55,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:55,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:46:55,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116912036] [2021-08-21 17:46:55,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:46:55,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:46:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:46:55,992 INFO L87 Difference]: Start difference. First operand 1244 states and 2820 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:56,057 INFO L93 Difference]: Finished difference Result 1343 states and 2963 transitions. [2021-08-21 17:46:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:46:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:46:56,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:56,059 INFO L225 Difference]: With dead ends: 1343 [2021-08-21 17:46:56,059 INFO L226 Difference]: Without dead ends: 1343 [2021-08-21 17:46:56,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:46:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-08-21 17:46:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1256. [2021-08-21 17:46:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 2.2693227091633466) internal successors, (2848), 1255 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 2848 transitions. [2021-08-21 17:46:56,089 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 2848 transitions. Word has length 20 [2021-08-21 17:46:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:56,090 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 2848 transitions. [2021-08-21 17:46:56,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 2848 transitions. [2021-08-21 17:46:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:56,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:56,091 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:56,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 17:46:56,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:56,291 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:56,292 INFO L82 PathProgramCache]: Analyzing trace with hash -33188109, now seen corresponding path program 150 times [2021-08-21 17:46:56,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:56,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196513457] [2021-08-21 17:46:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:56,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:56,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:56,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196513457] [2021-08-21 17:46:56,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196513457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:56,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363056866] [2021-08-21 17:46:56,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:56,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:56,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:56,376 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:56,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 17:46:57,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:46:57,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:58,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363056866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:58,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:58,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:46:58,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589383840] [2021-08-21 17:46:58,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:46:58,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:46:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:46:58,025 INFO L87 Difference]: Start difference. First operand 1256 states and 2848 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:46:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:58,107 INFO L93 Difference]: Finished difference Result 1364 states and 3005 transitions. [2021-08-21 17:46:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:46:58,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:46:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:58,109 INFO L225 Difference]: With dead ends: 1364 [2021-08-21 17:46:58,109 INFO L226 Difference]: Without dead ends: 1364 [2021-08-21 17:46:58,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:46:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-08-21 17:46:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1204. [2021-08-21 17:46:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.2726517040731506) internal successors, (2734), 1203 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2734 transitions. [2021-08-21 17:46:58,123 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2734 transitions. Word has length 20 [2021-08-21 17:46:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:58,123 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 2734 transitions. [2021-08-21 17:46:58,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:46:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2734 transitions. [2021-08-21 17:46:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:58,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:58,124 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:58,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 17:46:58,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:58,325 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1106273489, now seen corresponding path program 151 times [2021-08-21 17:46:58,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:58,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602327895] [2021-08-21 17:46:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:58,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:58,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:58,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602327895] [2021-08-21 17:46:58,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602327895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:58,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87427086] [2021-08-21 17:46:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:58,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:58,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:58,387 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:58,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 17:46:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:46:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:00,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87427086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:00,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:00,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:47:00,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515814921] [2021-08-21 17:47:00,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:00,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:00,067 INFO L87 Difference]: Start difference. First operand 1204 states and 2734 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:00,155 INFO L93 Difference]: Finished difference Result 1307 states and 2871 transitions. [2021-08-21 17:47:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:47:00,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:47:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:00,157 INFO L225 Difference]: With dead ends: 1307 [2021-08-21 17:47:00,157 INFO L226 Difference]: Without dead ends: 1307 [2021-08-21 17:47:00,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:47:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-08-21 17:47:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1022. [2021-08-21 17:47:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.2918707149853086) internal successors, (2340), 1021 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2340 transitions. [2021-08-21 17:47:00,169 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2340 transitions. Word has length 20 [2021-08-21 17:47:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:00,169 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 2340 transitions. [2021-08-21 17:47:00,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2340 transitions. [2021-08-21 17:47:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:00,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:00,170 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:00,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 17:47:00,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:00,371 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -12181901, now seen corresponding path program 152 times [2021-08-21 17:47:00,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:00,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574586532] [2021-08-21 17:47:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:00,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:47:00,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:00,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574586532] [2021-08-21 17:47:00,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574586532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:00,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809561847] [2021-08-21 17:47:00,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:00,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:00,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:00,443 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:00,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 17:47:02,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:02,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:47:02,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809561847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:02,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:02,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:47:02,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830308183] [2021-08-21 17:47:02,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:02,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:02,109 INFO L87 Difference]: Start difference. First operand 1022 states and 2340 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:02,170 INFO L93 Difference]: Finished difference Result 1300 states and 2904 transitions. [2021-08-21 17:47:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:47:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:47:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:02,172 INFO L225 Difference]: With dead ends: 1300 [2021-08-21 17:47:02,172 INFO L226 Difference]: Without dead ends: 1300 [2021-08-21 17:47:02,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:47:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-08-21 17:47:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1270. [2021-08-21 17:47:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.2537431048069347) internal successors, (2860), 1269 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2860 transitions. [2021-08-21 17:47:02,187 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2860 transitions. Word has length 20 [2021-08-21 17:47:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:02,187 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 2860 transitions. [2021-08-21 17:47:02,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2860 transitions. [2021-08-21 17:47:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:02,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:02,188 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:02,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-21 17:47:02,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 17:47:02,388 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:02,389 INFO L82 PathProgramCache]: Analyzing trace with hash -455081041, now seen corresponding path program 153 times [2021-08-21 17:47:02,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:02,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647280154] [2021-08-21 17:47:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:02,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:02,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:02,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647280154] [2021-08-21 17:47:02,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647280154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:02,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313402160] [2021-08-21 17:47:02,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:47:02,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:02,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:02,457 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:02,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 17:47:04,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:47:04,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:04,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:04,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313402160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:04,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:04,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:04,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918664328] [2021-08-21 17:47:04,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:04,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:04,131 INFO L87 Difference]: Start difference. First operand 1270 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:04,231 INFO L93 Difference]: Finished difference Result 1318 states and 2940 transitions. [2021-08-21 17:47:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:47:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:04,233 INFO L225 Difference]: With dead ends: 1318 [2021-08-21 17:47:04,233 INFO L226 Difference]: Without dead ends: 1318 [2021-08-21 17:47:04,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:47:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-08-21 17:47:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1230. [2021-08-21 17:47:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.2603742880390563) internal successors, (2778), 1229 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2778 transitions. [2021-08-21 17:47:04,246 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2778 transitions. Word has length 20 [2021-08-21 17:47:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:04,246 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2778 transitions. [2021-08-21 17:47:04,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2778 transitions. [2021-08-21 17:47:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:04,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:04,247 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:04,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:04,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 17:47:04,448 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:04,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1300052493, now seen corresponding path program 154 times [2021-08-21 17:47:04,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:04,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331794052] [2021-08-21 17:47:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:04,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:04,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:04,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331794052] [2021-08-21 17:47:04,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331794052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:04,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293382976] [2021-08-21 17:47:04,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:47:04,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:04,521 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:04,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 17:47:06,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:47:06,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:06,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293382976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:06,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:06,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:06,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076102813] [2021-08-21 17:47:06,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:06,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:06,194 INFO L87 Difference]: Start difference. First operand 1230 states and 2778 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:06,327 INFO L93 Difference]: Finished difference Result 1329 states and 2976 transitions. [2021-08-21 17:47:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:47:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:06,329 INFO L225 Difference]: With dead ends: 1329 [2021-08-21 17:47:06,329 INFO L226 Difference]: Without dead ends: 1329 [2021-08-21 17:47:06,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:47:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-21 17:47:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1282. [2021-08-21 17:47:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 2.2498048399687742) internal successors, (2882), 1281 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2882 transitions. [2021-08-21 17:47:06,344 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2882 transitions. Word has length 20 [2021-08-21 17:47:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:06,344 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 2882 transitions. [2021-08-21 17:47:06,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2882 transitions. [2021-08-21 17:47:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:06,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:06,345 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:06,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-21 17:47:06,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 17:47:06,546 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1724363729, now seen corresponding path program 155 times [2021-08-21 17:47:06,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:06,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481440420] [2021-08-21 17:47:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:06,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:06,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:06,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481440420] [2021-08-21 17:47:06,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481440420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:06,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373955816] [2021-08-21 17:47:06,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:47:06,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:06,621 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:06,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 17:47:08,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:47:08,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:08,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:08,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373955816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:08,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:08,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:08,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998218953] [2021-08-21 17:47:08,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:08,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:08,295 INFO L87 Difference]: Start difference. First operand 1282 states and 2882 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:08,483 INFO L93 Difference]: Finished difference Result 1425 states and 3168 transitions. [2021-08-21 17:47:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:47:08,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:08,485 INFO L225 Difference]: With dead ends: 1425 [2021-08-21 17:47:08,485 INFO L226 Difference]: Without dead ends: 1425 [2021-08-21 17:47:08,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:47:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-08-21 17:47:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1299. [2021-08-21 17:47:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.24653312788906) internal successors, (2916), 1298 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2916 transitions. [2021-08-21 17:47:08,500 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2916 transitions. Word has length 20 [2021-08-21 17:47:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:08,500 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2916 transitions. [2021-08-21 17:47:08,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2916 transitions. [2021-08-21 17:47:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:08,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:08,502 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:08,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-21 17:47:08,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:08,702 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash 919038359, now seen corresponding path program 156 times [2021-08-21 17:47:08,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:08,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808068606] [2021-08-21 17:47:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:08,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:08,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:08,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808068606] [2021-08-21 17:47:08,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808068606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:08,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678874814] [2021-08-21 17:47:08,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:47:08,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:08,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:08,840 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:08,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 17:47:10,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:47:10,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:10,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 17:47:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:10,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:47:10,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 321 [2021-08-21 17:47:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:13,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678874814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:13,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:13,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 17:47:13,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816699207] [2021-08-21 17:47:13,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:47:13,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:47:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:47:13,519 INFO L87 Difference]: Start difference. First operand 1299 states and 2916 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:13,988 INFO L93 Difference]: Finished difference Result 1396 states and 3127 transitions. [2021-08-21 17:47:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:47:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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 20 [2021-08-21 17:47:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:13,990 INFO L225 Difference]: With dead ends: 1396 [2021-08-21 17:47:13,991 INFO L226 Difference]: Without dead ends: 1388 [2021-08-21 17:47:13,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:47:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-08-21 17:47:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1346. [2021-08-21 17:47:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 2.2646840148698884) internal successors, (3046), 1345 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 3046 transitions. [2021-08-21 17:47:14,007 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 3046 transitions. Word has length 20 [2021-08-21 17:47:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:14,007 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 3046 transitions. [2021-08-21 17:47:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 3046 transitions. [2021-08-21 17:47:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:14,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:14,008 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:14,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 17:47:14,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:14,209 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash -129950605, now seen corresponding path program 157 times [2021-08-21 17:47:14,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:14,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356312216] [2021-08-21 17:47:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:14,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:14,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:14,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356312216] [2021-08-21 17:47:14,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356312216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:14,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049716769] [2021-08-21 17:47:14,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:47:14,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:14,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:14,280 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:14,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 17:47:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049716769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:15,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:15,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:47:15,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116454583] [2021-08-21 17:47:15,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:47:15,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:47:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:47:15,977 INFO L87 Difference]: Start difference. First operand 1346 states and 3046 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:47:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:16,038 INFO L93 Difference]: Finished difference Result 1477 states and 3236 transitions. [2021-08-21 17:47:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:47:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:47:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:16,040 INFO L225 Difference]: With dead ends: 1477 [2021-08-21 17:47:16,040 INFO L226 Difference]: Without dead ends: 1477 [2021-08-21 17:47:16,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-08-21 17:47:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1354. [2021-08-21 17:47:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 2.2660753880266076) internal successors, (3066), 1353 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 3066 transitions. [2021-08-21 17:47:16,056 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 3066 transitions. Word has length 20 [2021-08-21 17:47:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:16,056 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 3066 transitions. [2021-08-21 17:47:16,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:47:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 3066 transitions. [2021-08-21 17:47:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:16,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:16,057 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:16,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-21 17:47:16,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:16,258 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1598585613, now seen corresponding path program 158 times [2021-08-21 17:47:16,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:16,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502016496] [2021-08-21 17:47:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:16,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:16,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:16,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502016496] [2021-08-21 17:47:16,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502016496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:16,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004587232] [2021-08-21 17:47:16,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:16,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:16,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:16,344 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:16,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 17:47:18,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:18,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:18,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004587232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:18,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:18,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:18,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797109373] [2021-08-21 17:47:18,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:18,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:18,064 INFO L87 Difference]: Start difference. First operand 1354 states and 3066 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:18,244 INFO L93 Difference]: Finished difference Result 1710 states and 3781 transitions. [2021-08-21 17:47:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:47:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:18,246 INFO L225 Difference]: With dead ends: 1710 [2021-08-21 17:47:18,246 INFO L226 Difference]: Without dead ends: 1710 [2021-08-21 17:47:18,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:47:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-08-21 17:47:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1423. [2021-08-21 17:47:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 2.2559774964838257) internal successors, (3208), 1422 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 3208 transitions. [2021-08-21 17:47:18,264 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 3208 transitions. Word has length 20 [2021-08-21 17:47:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:18,264 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 3208 transitions. [2021-08-21 17:47:18,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 3208 transitions. [2021-08-21 17:47:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:18,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:18,265 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:18,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:18,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:18,466 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1867332041, now seen corresponding path program 159 times [2021-08-21 17:47:18,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:18,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655713760] [2021-08-21 17:47:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:18,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:18,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:18,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655713760] [2021-08-21 17:47:18,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655713760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:18,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546050721] [2021-08-21 17:47:18,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:47:18,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:18,543 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:18,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 17:47:20,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:47:20,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:20,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:20,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:20,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546050721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:20,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:20,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:20,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553642300] [2021-08-21 17:47:20,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:20,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:20,263 INFO L87 Difference]: Start difference. First operand 1423 states and 3208 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:20,410 INFO L93 Difference]: Finished difference Result 1520 states and 3396 transitions. [2021-08-21 17:47:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:47:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:20,412 INFO L225 Difference]: With dead ends: 1520 [2021-08-21 17:47:20,412 INFO L226 Difference]: Without dead ends: 1520 [2021-08-21 17:47:20,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:47:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-21 17:47:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1432. [2021-08-21 17:47:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.2557651991614254) internal successors, (3228), 1431 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 3228 transitions. [2021-08-21 17:47:20,428 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 3228 transitions. Word has length 20 [2021-08-21 17:47:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:20,428 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 3228 transitions. [2021-08-21 17:47:20,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 3228 transitions. [2021-08-21 17:47:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:20,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:20,430 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:20,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-21 17:47:20,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:20,630 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2003324019, now seen corresponding path program 160 times [2021-08-21 17:47:20,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:20,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173054112] [2021-08-21 17:47:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:20,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:20,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:20,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173054112] [2021-08-21 17:47:20,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173054112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:20,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963613973] [2021-08-21 17:47:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:47:20,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:20,709 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:20,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 17:47:22,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:47:22,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:22,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963613973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:22,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:22,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:22,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924928377] [2021-08-21 17:47:22,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:22,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:22,437 INFO L87 Difference]: Start difference. First operand 1432 states and 3228 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:22,630 INFO L93 Difference]: Finished difference Result 1547 states and 3458 transitions. [2021-08-21 17:47:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:47:22,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:22,632 INFO L225 Difference]: With dead ends: 1547 [2021-08-21 17:47:22,632 INFO L226 Difference]: Without dead ends: 1547 [2021-08-21 17:47:22,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:47:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-08-21 17:47:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1440. [2021-08-21 17:47:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.254343293954135) internal successors, (3244), 1439 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3244 transitions. [2021-08-21 17:47:22,647 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3244 transitions. Word has length 20 [2021-08-21 17:47:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:22,647 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 3244 transitions. [2021-08-21 17:47:22,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3244 transitions. [2021-08-21 17:47:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:22,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:22,649 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:22,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-21 17:47:22,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:22,849 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:22,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1021730703, now seen corresponding path program 161 times [2021-08-21 17:47:22,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:22,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015415912] [2021-08-21 17:47:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:22,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:23,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:23,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015415912] [2021-08-21 17:47:23,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015415912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:23,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476958536] [2021-08-21 17:47:23,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:47:23,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:23,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:23,002 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:23,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 17:47:24,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:47:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:47:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:25,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:47:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 286 [2021-08-21 17:47:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:27,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476958536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:27,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:27,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:47:27,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288515408] [2021-08-21 17:47:27,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:47:27,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:47:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:47:27,736 INFO L87 Difference]: Start difference. First operand 1440 states and 3244 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:28,043 INFO L93 Difference]: Finished difference Result 1621 states and 3623 transitions. [2021-08-21 17:47:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:47:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-08-21 17:47:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:28,045 INFO L225 Difference]: With dead ends: 1621 [2021-08-21 17:47:28,045 INFO L226 Difference]: Without dead ends: 1617 [2021-08-21 17:47:28,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:47:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-08-21 17:47:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1595. [2021-08-21 17:47:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 2.2440401505646173) internal successors, (3577), 1594 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 3577 transitions. [2021-08-21 17:47:28,062 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 3577 transitions. Word has length 20 [2021-08-21 17:47:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:28,062 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 3577 transitions. [2021-08-21 17:47:28,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 3577 transitions. [2021-08-21 17:47:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:28,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:28,064 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:28,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:28,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-08-21 17:47:28,264 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:28,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1831077329, now seen corresponding path program 162 times [2021-08-21 17:47:28,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:28,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769752629] [2021-08-21 17:47:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:28,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:28,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:28,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769752629] [2021-08-21 17:47:28,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769752629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:28,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865471746] [2021-08-21 17:47:28,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:47:28,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:28,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:28,325 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:28,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 17:47:30,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:47:30,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:30,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:30,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:30,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865471746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:30,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:30,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:47:30,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565879498] [2021-08-21 17:47:30,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:47:30,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:47:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:47:30,083 INFO L87 Difference]: Start difference. First operand 1595 states and 3577 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:47:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:30,168 INFO L93 Difference]: Finished difference Result 1737 states and 3781 transitions. [2021-08-21 17:47:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:47:30,179 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:47:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:30,182 INFO L225 Difference]: With dead ends: 1737 [2021-08-21 17:47:30,182 INFO L226 Difference]: Without dead ends: 1737 [2021-08-21 17:47:30,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:47:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-08-21 17:47:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1610. [2021-08-21 17:47:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 2.2461155997513984) internal successors, (3614), 1609 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 3614 transitions. [2021-08-21 17:47:30,217 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 3614 transitions. Word has length 20 [2021-08-21 17:47:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:30,217 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 3614 transitions. [2021-08-21 17:47:30,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:47:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 3614 transitions. [2021-08-21 17:47:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:30,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:30,219 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:30,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-21 17:47:30,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 17:47:30,420 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:30,420 INFO L82 PathProgramCache]: Analyzing trace with hash -341672333, now seen corresponding path program 163 times [2021-08-21 17:47:30,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:30,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689579641] [2021-08-21 17:47:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:30,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:30,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:30,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689579641] [2021-08-21 17:47:30,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689579641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:30,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339764851] [2021-08-21 17:47:30,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:47:30,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:30,483 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:30,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 17:47:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:32,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:47:32,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339764851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:32,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:32,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:47:32,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739692937] [2021-08-21 17:47:32,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:47:32,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:47:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:47:32,224 INFO L87 Difference]: Start difference. First operand 1610 states and 3614 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:47:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:32,325 INFO L93 Difference]: Finished difference Result 1774 states and 3894 transitions. [2021-08-21 17:47:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:47:32,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 20 [2021-08-21 17:47:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:32,327 INFO L225 Difference]: With dead ends: 1774 [2021-08-21 17:47:32,327 INFO L226 Difference]: Without dead ends: 1774 [2021-08-21 17:47:32,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:47:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-08-21 17:47:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1677. [2021-08-21 17:47:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.242840095465394) internal successors, (3759), 1676 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 3759 transitions. [2021-08-21 17:47:32,346 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 3759 transitions. Word has length 20 [2021-08-21 17:47:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:32,346 INFO L470 AbstractCegarLoop]: Abstraction has 1677 states and 3759 transitions. [2021-08-21 17:47:32,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:47:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 3759 transitions. [2021-08-21 17:47:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:32,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:32,347 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:32,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-21 17:47:32,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 17:47:32,548 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1414757713, now seen corresponding path program 164 times [2021-08-21 17:47:32,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:32,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517595297] [2021-08-21 17:47:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:32,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:32,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:32,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517595297] [2021-08-21 17:47:32,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517595297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:32,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272743695] [2021-08-21 17:47:32,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:32,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:32,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:32,609 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:32,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 17:47:34,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:34,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272743695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:34,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:34,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:47:34,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228018136] [2021-08-21 17:47:34,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:34,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:34,394 INFO L87 Difference]: Start difference. First operand 1677 states and 3759 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:34,529 INFO L93 Difference]: Finished difference Result 1787 states and 3920 transitions. [2021-08-21 17:47:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:47:34,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:47:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:34,532 INFO L225 Difference]: With dead ends: 1787 [2021-08-21 17:47:34,532 INFO L226 Difference]: Without dead ends: 1787 [2021-08-21 17:47:34,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:47:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-08-21 17:47:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1688. [2021-08-21 17:47:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 2.241256668642561) internal successors, (3781), 1687 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 3781 transitions. [2021-08-21 17:47:34,552 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 3781 transitions. Word has length 20 [2021-08-21 17:47:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:34,552 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 3781 transitions. [2021-08-21 17:47:34,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 3781 transitions. [2021-08-21 17:47:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:34,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:34,554 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:34,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:34,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 17:47:34,755 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash -320666125, now seen corresponding path program 165 times [2021-08-21 17:47:34,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:34,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313747314] [2021-08-21 17:47:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:34,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:34,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:34,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313747314] [2021-08-21 17:47:34,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313747314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:34,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849861045] [2021-08-21 17:47:34,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:47:34,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:34,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:34,828 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:34,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 17:47:36,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:47:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849861045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:36,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:36,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:47:36,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904177915] [2021-08-21 17:47:36,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:36,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:36,735 INFO L87 Difference]: Start difference. First operand 1688 states and 3781 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:36,819 INFO L93 Difference]: Finished difference Result 1966 states and 4334 transitions. [2021-08-21 17:47:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:47:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:47:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:36,821 INFO L225 Difference]: With dead ends: 1966 [2021-08-21 17:47:36,821 INFO L226 Difference]: Without dead ends: 1966 [2021-08-21 17:47:36,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:47:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-08-21 17:47:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1905. [2021-08-21 17:47:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 2.2205882352941178) internal successors, (4228), 1904 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 4228 transitions. [2021-08-21 17:47:36,840 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 4228 transitions. Word has length 20 [2021-08-21 17:47:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:36,840 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 4228 transitions. [2021-08-21 17:47:36,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 4228 transitions. [2021-08-21 17:47:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:36,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:36,842 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:36,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-21 17:47:37,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 17:47:37,042 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:37,043 INFO L82 PathProgramCache]: Analyzing trace with hash -763565265, now seen corresponding path program 166 times [2021-08-21 17:47:37,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:37,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520086046] [2021-08-21 17:47:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:37,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:47:37,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520086046] [2021-08-21 17:47:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520086046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310118770] [2021-08-21 17:47:37,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:47:37,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:37,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:37,114 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:37,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 17:47:38,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:47:38,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:38,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:38,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:47:38,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310118770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:38,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:38,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:47:38,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779205314] [2021-08-21 17:47:38,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:38,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:38,887 INFO L87 Difference]: Start difference. First operand 1905 states and 4228 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:38,948 INFO L93 Difference]: Finished difference Result 1957 states and 4332 transitions. [2021-08-21 17:47:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:47:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 20 [2021-08-21 17:47:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:38,951 INFO L225 Difference]: With dead ends: 1957 [2021-08-21 17:47:38,951 INFO L226 Difference]: Without dead ends: 1957 [2021-08-21 17:47:38,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:47:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-08-21 17:47:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1949. [2021-08-21 17:47:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 2.215605749486653) internal successors, (4316), 1948 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 4316 transitions. [2021-08-21 17:47:38,974 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 4316 transitions. Word has length 20 [2021-08-21 17:47:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:38,974 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 4316 transitions. [2021-08-21 17:47:38,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:47:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 4316 transitions. [2021-08-21 17:47:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:38,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:38,976 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:38,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:39,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:39,177 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1608536717, now seen corresponding path program 167 times [2021-08-21 17:47:39,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:39,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518125850] [2021-08-21 17:47:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:39,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:39,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:39,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518125850] [2021-08-21 17:47:39,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518125850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:39,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793595596] [2021-08-21 17:47:39,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:47:39,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:39,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:39,249 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:39,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 17:47:40,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:47:40,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:40,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:40,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:41,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793595596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:41,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:41,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:41,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203804690] [2021-08-21 17:47:41,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:41,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:41,037 INFO L87 Difference]: Start difference. First operand 1949 states and 4316 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:41,144 INFO L93 Difference]: Finished difference Result 1973 states and 4364 transitions. [2021-08-21 17:47:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:47:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:41,146 INFO L225 Difference]: With dead ends: 1973 [2021-08-21 17:47:41,147 INFO L226 Difference]: Without dead ends: 1973 [2021-08-21 17:47:41,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:47:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-08-21 17:47:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1948. [2021-08-21 17:47:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 2.2157164869029278) internal successors, (4314), 1947 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 4314 transitions. [2021-08-21 17:47:41,168 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 4314 transitions. Word has length 20 [2021-08-21 17:47:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:41,168 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 4314 transitions. [2021-08-21 17:47:41,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 4314 transitions. [2021-08-21 17:47:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:41,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:41,170 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:41,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-21 17:47:41,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:41,371 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:41,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2032847953, now seen corresponding path program 168 times [2021-08-21 17:47:41,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:41,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759369145] [2021-08-21 17:47:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:41,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:41,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:41,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759369145] [2021-08-21 17:47:41,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759369145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:41,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59671502] [2021-08-21 17:47:41,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:47:41,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:41,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:41,471 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:41,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 17:47:43,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:47:43,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:43,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59671502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:43,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:43,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:43,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803653891] [2021-08-21 17:47:43,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:43,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:43,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:43,268 INFO L87 Difference]: Start difference. First operand 1948 states and 4314 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:43,398 INFO L93 Difference]: Finished difference Result 2022 states and 4462 transitions. [2021-08-21 17:47:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:47:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:43,400 INFO L225 Difference]: With dead ends: 2022 [2021-08-21 17:47:43,400 INFO L226 Difference]: Without dead ends: 2022 [2021-08-21 17:47:43,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:47:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-08-21 17:47:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1960. [2021-08-21 17:47:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 2.214395099540582) internal successors, (4338), 1959 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 4338 transitions. [2021-08-21 17:47:43,421 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 4338 transitions. Word has length 20 [2021-08-21 17:47:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:43,421 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 4338 transitions. [2021-08-21 17:47:43,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 4338 transitions. [2021-08-21 17:47:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:47:43,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:43,423 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:43,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:43,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-21 17:47:43,624 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:43,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1993372915, now seen corresponding path program 169 times [2021-08-21 17:47:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:43,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644615993] [2021-08-21 17:47:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:43,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:43,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:43,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644615993] [2021-08-21 17:47:43,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644615993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:43,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85515308] [2021-08-21 17:47:43,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:47:43,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:43,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:43,703 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:43,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 17:47:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:45,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:47:45,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:45,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85515308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:45,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:45,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:47:45,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615793930] [2021-08-21 17:47:45,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:47:45,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:45,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:47:45,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:45,506 INFO L87 Difference]: Start difference. First operand 1960 states and 4338 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:45,666 INFO L93 Difference]: Finished difference Result 2160 states and 4738 transitions. [2021-08-21 17:47:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:47:45,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) Word has length 20 [2021-08-21 17:47:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:45,669 INFO L225 Difference]: With dead ends: 2160 [2021-08-21 17:47:45,669 INFO L226 Difference]: Without dead ends: 2160 [2021-08-21 17:47:45,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:47:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-08-21 17:47:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1975. [2021-08-21 17:47:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 2.2127659574468086) internal successors, (4368), 1974 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 4368 transitions. [2021-08-21 17:47:45,692 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 4368 transitions. Word has length 20 [2021-08-21 17:47:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:45,692 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 4368 transitions. [2021-08-21 17:47:45,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-08-21 17:47:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 4368 transitions. [2021-08-21 17:47:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:47:45,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:45,694 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:45,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:45,895 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash 314300278, now seen corresponding path program 170 times [2021-08-21 17:47:45,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:45,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382000988] [2021-08-21 17:47:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:45,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:45,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:45,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382000988] [2021-08-21 17:47:45,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382000988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:45,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404807977] [2021-08-21 17:47:45,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:45,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:45,977 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:45,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 17:47:47,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:47,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:47,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:47:47,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:47,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404807977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:47,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:47,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:47:47,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080386032] [2021-08-21 17:47:47,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:47:47,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:47,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:47:47,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:47:47,777 INFO L87 Difference]: Start difference. First operand 1975 states and 4368 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:47,949 INFO L93 Difference]: Finished difference Result 2087 states and 4532 transitions. [2021-08-21 17:47:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:47:47,949 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 21 [2021-08-21 17:47:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:47,951 INFO L225 Difference]: With dead ends: 2087 [2021-08-21 17:47:47,951 INFO L226 Difference]: Without dead ends: 2084 [2021-08-21 17:47:47,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:47:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-08-21 17:47:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1945. [2021-08-21 17:47:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 2.2073045267489713) internal successors, (4291), 1944 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 4291 transitions. [2021-08-21 17:47:47,973 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 4291 transitions. Word has length 21 [2021-08-21 17:47:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:47,973 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 4291 transitions. [2021-08-21 17:47:47,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 4291 transitions. [2021-08-21 17:47:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:47:47,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:47,975 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:47,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-08-21 17:47:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:48,175 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1245182866, now seen corresponding path program 171 times [2021-08-21 17:47:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:48,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455647081] [2021-08-21 17:47:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:48,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:48,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:48,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455647081] [2021-08-21 17:47:48,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455647081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:48,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669421693] [2021-08-21 17:47:48,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:47:48,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:48,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:48,262 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:48,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 17:47:50,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:47:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:47:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:50,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669421693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:50,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:50,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:47:50,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097834916] [2021-08-21 17:47:50,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:47:50,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:47:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:47:50,074 INFO L87 Difference]: Start difference. First operand 1945 states and 4291 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:50,209 INFO L93 Difference]: Finished difference Result 2014 states and 4419 transitions. [2021-08-21 17:47:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:47:50,209 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 21 [2021-08-21 17:47:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:50,211 INFO L225 Difference]: With dead ends: 2014 [2021-08-21 17:47:50,211 INFO L226 Difference]: Without dead ends: 2012 [2021-08-21 17:47:50,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:47:50,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-08-21 17:47:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1932. [2021-08-21 17:47:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.20559295701709) internal successors, (4259), 1931 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 4259 transitions. [2021-08-21 17:47:50,232 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 4259 transitions. Word has length 21 [2021-08-21 17:47:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:50,232 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 4259 transitions. [2021-08-21 17:47:50,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 4259 transitions. [2021-08-21 17:47:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:47:50,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:50,234 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:50,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-21 17:47:50,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-08-21 17:47:50,434 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1357216016, now seen corresponding path program 172 times [2021-08-21 17:47:50,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:50,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49127921] [2021-08-21 17:47:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:50,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:50,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:50,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49127921] [2021-08-21 17:47:50,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49127921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:50,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854791311] [2021-08-21 17:47:50,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:47:50,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:50,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:50,505 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:50,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 17:47:52,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:47:52,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:47:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:52,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854791311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:52,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:52,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:47:52,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514461967] [2021-08-21 17:47:52,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:52,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:52,344 INFO L87 Difference]: Start difference. First operand 1932 states and 4259 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:52,405 INFO L93 Difference]: Finished difference Result 2045 states and 4410 transitions. [2021-08-21 17:47:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:47:52,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:47:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:52,407 INFO L225 Difference]: With dead ends: 2045 [2021-08-21 17:47:52,408 INFO L226 Difference]: Without dead ends: 2045 [2021-08-21 17:47:52,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-08-21 17:47:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1916. [2021-08-21 17:47:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 2.1989556135770236) internal successors, (4211), 1915 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 4211 transitions. [2021-08-21 17:47:52,428 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 4211 transitions. Word has length 21 [2021-08-21 17:47:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:52,428 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 4211 transitions. [2021-08-21 17:47:52,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 4211 transitions. [2021-08-21 17:47:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:47:52,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:52,430 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:52,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-08-21 17:47:52,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:52,631 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:52,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1427340076, now seen corresponding path program 173 times [2021-08-21 17:47:52,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:52,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626280836] [2021-08-21 17:47:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:52,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:52,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:52,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626280836] [2021-08-21 17:47:52,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626280836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:52,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127976355] [2021-08-21 17:47:52,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:47:52,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:52,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:52,699 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:52,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 17:47:54,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:47:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:47:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127976355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:54,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:54,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:47:54,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747679268] [2021-08-21 17:47:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:54,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:54,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:54,504 INFO L87 Difference]: Start difference. First operand 1916 states and 4211 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:54,570 INFO L93 Difference]: Finished difference Result 2130 states and 4585 transitions. [2021-08-21 17:47:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:47:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:47:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:54,573 INFO L225 Difference]: With dead ends: 2130 [2021-08-21 17:47:54,573 INFO L226 Difference]: Without dead ends: 2130 [2021-08-21 17:47:54,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:47:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-08-21 17:47:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1927. [2021-08-21 17:47:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.202492211838006) internal successors, (4242), 1926 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 4242 transitions. [2021-08-21 17:47:54,592 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 4242 transitions. Word has length 21 [2021-08-21 17:47:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:54,592 INFO L470 AbstractCegarLoop]: Abstraction has 1927 states and 4242 transitions. [2021-08-21 17:47:54,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 4242 transitions. [2021-08-21 17:47:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:47:54,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:54,594 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:54,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:54,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:54,795 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1849233008, now seen corresponding path program 174 times [2021-08-21 17:47:54,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:54,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092739545] [2021-08-21 17:47:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:54,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:54,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:54,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092739545] [2021-08-21 17:47:54,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092739545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:54,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503672074] [2021-08-21 17:47:54,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:47:54,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:54,887 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:54,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 17:47:56,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:47:56,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:47:56,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:56,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503672074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:56,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:56,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:47:56,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793910920] [2021-08-21 17:47:56,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:47:56,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:47:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:56,705 INFO L87 Difference]: Start difference. First operand 1927 states and 4242 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:56,794 INFO L93 Difference]: Finished difference Result 2234 states and 4802 transitions. [2021-08-21 17:47:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:47:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:47:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:56,796 INFO L225 Difference]: With dead ends: 2234 [2021-08-21 17:47:56,796 INFO L226 Difference]: Without dead ends: 2234 [2021-08-21 17:47:56,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:47:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-08-21 17:47:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1930. [2021-08-21 17:47:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 2.2021772939346813) internal successors, (4248), 1929 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 4248 transitions. [2021-08-21 17:47:56,816 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 4248 transitions. Word has length 21 [2021-08-21 17:47:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:56,816 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 4248 transitions. [2021-08-21 17:47:56,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 4248 transitions. [2021-08-21 17:47:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:47:56,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:56,818 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:56,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-08-21 17:47:57,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:57,022 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1824375882, now seen corresponding path program 175 times [2021-08-21 17:47:57,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:57,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052242343] [2021-08-21 17:47:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:57,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:47:57,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:57,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052242343] [2021-08-21 17:47:57,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052242343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:57,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384938772] [2021-08-21 17:47:57,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:47:57,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:57,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:57,079 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:57,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 17:47:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:58,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:47:58,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:47:58,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384938772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:58,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:58,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:47:58,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599764230] [2021-08-21 17:47:58,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:47:58,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:47:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:47:58,912 INFO L87 Difference]: Start difference. First operand 1930 states and 4248 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:58,998 INFO L93 Difference]: Finished difference Result 2008 states and 4342 transitions. [2021-08-21 17:47:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:47:58,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:47:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:59,001 INFO L225 Difference]: With dead ends: 2008 [2021-08-21 17:47:59,001 INFO L226 Difference]: Without dead ends: 2007 [2021-08-21 17:47:59,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:47:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-08-21 17:47:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1943. [2021-08-21 17:47:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 2.201338825952626) internal successors, (4275), 1942 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 4275 transitions. [2021-08-21 17:47:59,024 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 4275 transitions. Word has length 21 [2021-08-21 17:47:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:59,024 INFO L470 AbstractCegarLoop]: Abstraction has 1943 states and 4275 transitions. [2021-08-21 17:47:59,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 4275 transitions. [2021-08-21 17:47:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:47:59,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:59,026 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:59,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-08-21 17:47:59,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-21 17:47:59,226 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1550890706, now seen corresponding path program 176 times [2021-08-21 17:47:59,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:59,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546464504] [2021-08-21 17:47:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:59,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:47:59,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:59,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546464504] [2021-08-21 17:47:59,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546464504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:59,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600977600] [2021-08-21 17:47:59,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:59,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:59,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:59,286 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:59,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 17:48:01,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:48:01,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:48:01,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600977600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:01,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:01,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:01,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690965770] [2021-08-21 17:48:01,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:01,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:01,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:01,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:01,116 INFO L87 Difference]: Start difference. First operand 1943 states and 4275 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:01,173 INFO L93 Difference]: Finished difference Result 2060 states and 4526 transitions. [2021-08-21 17:48:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:48:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:01,176 INFO L225 Difference]: With dead ends: 2060 [2021-08-21 17:48:01,176 INFO L226 Difference]: Without dead ends: 2059 [2021-08-21 17:48:01,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-21 17:48:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1954. [2021-08-21 17:48:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1953 states have (on average 2.207373271889401) internal successors, (4311), 1953 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 4311 transitions. [2021-08-21 17:48:01,196 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 4311 transitions. Word has length 21 [2021-08-21 17:48:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:01,196 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 4311 transitions. [2021-08-21 17:48:01,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 4311 transitions. [2021-08-21 17:48:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:01,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:01,198 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:01,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-21 17:48:01,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:01,399 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:01,399 INFO L82 PathProgramCache]: Analyzing trace with hash 741544080, now seen corresponding path program 177 times [2021-08-21 17:48:01,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:01,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391912545] [2021-08-21 17:48:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:01,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:01,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:01,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391912545] [2021-08-21 17:48:01,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391912545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:01,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254213073] [2021-08-21 17:48:01,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:48:01,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:01,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:01,466 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:01,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 17:48:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:48:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:48:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254213073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:03,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:03,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:03,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728889725] [2021-08-21 17:48:03,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:03,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:03,308 INFO L87 Difference]: Start difference. First operand 1954 states and 4311 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:03,361 INFO L93 Difference]: Finished difference Result 2013 states and 4361 transitions. [2021-08-21 17:48:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:48:03,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:03,363 INFO L225 Difference]: With dead ends: 2013 [2021-08-21 17:48:03,364 INFO L226 Difference]: Without dead ends: 2013 [2021-08-21 17:48:03,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:48:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-08-21 17:48:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1950. [2021-08-21 17:48:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 2.2047203694202153) internal successors, (4297), 1949 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 4297 transitions. [2021-08-21 17:48:03,385 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 4297 transitions. Word has length 21 [2021-08-21 17:48:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:03,385 INFO L470 AbstractCegarLoop]: Abstraction has 1950 states and 4297 transitions. [2021-08-21 17:48:03,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 4297 transitions. [2021-08-21 17:48:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:03,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:03,387 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:03,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:03,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:03,588 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:03,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2064018220, now seen corresponding path program 178 times [2021-08-21 17:48:03,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:03,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995936438] [2021-08-21 17:48:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:03,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:03,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:03,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995936438] [2021-08-21 17:48:03,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995936438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:03,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141948866] [2021-08-21 17:48:03,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:48:03,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:03,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:03,651 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:03,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 17:48:05,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:48:05,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141948866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:05,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:05,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:48:05,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740392218] [2021-08-21 17:48:05,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:48:05,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:48:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:48:05,516 INFO L87 Difference]: Start difference. First operand 1950 states and 4297 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:48:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:05,601 INFO L93 Difference]: Finished difference Result 2120 states and 4575 transitions. [2021-08-21 17:48:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:48:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:48:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:05,604 INFO L225 Difference]: With dead ends: 2120 [2021-08-21 17:48:05,604 INFO L226 Difference]: Without dead ends: 2120 [2021-08-21 17:48:05,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:48:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-08-21 17:48:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1958. [2021-08-21 17:48:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.203883495145631) internal successors, (4313), 1957 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 4313 transitions. [2021-08-21 17:48:05,635 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 4313 transitions. Word has length 21 [2021-08-21 17:48:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:05,635 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 4313 transitions. [2021-08-21 17:48:05,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:48:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 4313 transitions. [2021-08-21 17:48:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:05,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:05,638 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:05,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-21 17:48:05,853 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1157863696, now seen corresponding path program 179 times [2021-08-21 17:48:05,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:05,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738988878] [2021-08-21 17:48:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:05,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:05,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:05,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738988878] [2021-08-21 17:48:05,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738988878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:05,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90975252] [2021-08-21 17:48:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:48:05,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:05,921 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:05,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 17:48:07,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:48:07,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:07,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90975252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:07,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:07,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:48:07,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639642518] [2021-08-21 17:48:07,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:48:07,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:07,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:48:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:48:07,804 INFO L87 Difference]: Start difference. First operand 1958 states and 4313 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:07,897 INFO L93 Difference]: Finished difference Result 2240 states and 4815 transitions. [2021-08-21 17:48:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:48:07,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:48:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:07,900 INFO L225 Difference]: With dead ends: 2240 [2021-08-21 17:48:07,900 INFO L226 Difference]: Without dead ends: 2240 [2021-08-21 17:48:07,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:48:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-08-21 17:48:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 1967. [2021-08-21 17:48:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 2.2029501525940995) internal successors, (4331), 1966 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 4331 transitions. [2021-08-21 17:48:07,923 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 4331 transitions. Word has length 21 [2021-08-21 17:48:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:07,923 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 4331 transitions. [2021-08-21 17:48:07,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 4331 transitions. [2021-08-21 17:48:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:07,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:07,925 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:07,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-21 17:48:08,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:08,125 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2043012012, now seen corresponding path program 180 times [2021-08-21 17:48:08,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:08,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843615586] [2021-08-21 17:48:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:08,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:08,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:08,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843615586] [2021-08-21 17:48:08,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843615586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:08,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101022754] [2021-08-21 17:48:08,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:48:08,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:08,199 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:08,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 17:48:10,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:48:10,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:10,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:10,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:10,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101022754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:10,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:10,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:48:10,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878161814] [2021-08-21 17:48:10,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:10,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:10,059 INFO L87 Difference]: Start difference. First operand 1967 states and 4331 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:10,189 INFO L93 Difference]: Finished difference Result 2386 states and 5107 transitions. [2021-08-21 17:48:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:48:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:10,192 INFO L225 Difference]: With dead ends: 2386 [2021-08-21 17:48:10,192 INFO L226 Difference]: Without dead ends: 2386 [2021-08-21 17:48:10,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:48:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-08-21 17:48:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1857. [2021-08-21 17:48:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 2.1918103448275863) internal successors, (4068), 1856 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 4068 transitions. [2021-08-21 17:48:10,216 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 4068 transitions. Word has length 21 [2021-08-21 17:48:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:10,216 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 4068 transitions. [2021-08-21 17:48:10,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 4068 transitions. [2021-08-21 17:48:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:10,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:10,218 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:10,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:10,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:10,419 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:10,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1201308726, now seen corresponding path program 181 times [2021-08-21 17:48:10,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:10,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446732177] [2021-08-21 17:48:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:10,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:10,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:10,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446732177] [2021-08-21 17:48:10,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446732177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:10,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482953742] [2021-08-21 17:48:10,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:48:10,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:10,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:10,476 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:10,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 17:48:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:12,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:48:12,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482953742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:12,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:12,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:12,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270430654] [2021-08-21 17:48:12,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:12,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:12,358 INFO L87 Difference]: Start difference. First operand 1857 states and 4068 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:12,441 INFO L93 Difference]: Finished difference Result 1916 states and 4122 transitions. [2021-08-21 17:48:12,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:48:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:12,443 INFO L225 Difference]: With dead ends: 1916 [2021-08-21 17:48:12,443 INFO L226 Difference]: Without dead ends: 1915 [2021-08-21 17:48:12,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:48:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-08-21 17:48:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1857. [2021-08-21 17:48:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 2.189655172413793) internal successors, (4064), 1856 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 4064 transitions. [2021-08-21 17:48:12,464 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 4064 transitions. Word has length 21 [2021-08-21 17:48:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:12,464 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 4064 transitions. [2021-08-21 17:48:12,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:12,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 4064 transitions. [2021-08-21 17:48:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:12,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:12,466 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:12,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:12,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:12,667 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash 281608018, now seen corresponding path program 182 times [2021-08-21 17:48:12,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:12,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069715500] [2021-08-21 17:48:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:12,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:12,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:12,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069715500] [2021-08-21 17:48:12,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069715500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:12,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111275600] [2021-08-21 17:48:12,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:48:12,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:12,725 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:12,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 17:48:14,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:48:14,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:48:14,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111275600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:14,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:14,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:14,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240263851] [2021-08-21 17:48:14,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:14,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:14,602 INFO L87 Difference]: Start difference. First operand 1857 states and 4064 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:14,652 INFO L93 Difference]: Finished difference Result 1977 states and 4306 transitions. [2021-08-21 17:48:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:48:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:14,654 INFO L225 Difference]: With dead ends: 1977 [2021-08-21 17:48:14,654 INFO L226 Difference]: Without dead ends: 1976 [2021-08-21 17:48:14,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:48:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-08-21 17:48:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1861. [2021-08-21 17:48:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 2.193010752688172) internal successors, (4079), 1860 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 4079 transitions. [2021-08-21 17:48:14,674 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 4079 transitions. Word has length 21 [2021-08-21 17:48:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:14,674 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 4079 transitions. [2021-08-21 17:48:14,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 4079 transitions. [2021-08-21 17:48:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:14,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:14,676 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:14,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:14,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:14,877 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:14,877 INFO L82 PathProgramCache]: Analyzing trace with hash -527738608, now seen corresponding path program 183 times [2021-08-21 17:48:14,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:14,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350713582] [2021-08-21 17:48:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:14,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:14,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:14,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350713582] [2021-08-21 17:48:14,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350713582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:14,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163007062] [2021-08-21 17:48:14,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:48:14,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:14,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:14,932 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:14,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 17:48:16,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:48:16,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:16,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:16,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:16,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163007062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:16,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:16,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:16,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548463123] [2021-08-21 17:48:16,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:16,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:16,808 INFO L87 Difference]: Start difference. First operand 1861 states and 4079 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:16,861 INFO L93 Difference]: Finished difference Result 1960 states and 4217 transitions. [2021-08-21 17:48:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:48:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:16,864 INFO L225 Difference]: With dead ends: 1960 [2021-08-21 17:48:16,864 INFO L226 Difference]: Without dead ends: 1960 [2021-08-21 17:48:16,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:48:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-08-21 17:48:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1861. [2021-08-21 17:48:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 2.19247311827957) internal successors, (4078), 1860 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 4078 transitions. [2021-08-21 17:48:16,882 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 4078 transitions. Word has length 21 [2021-08-21 17:48:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:16,882 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 4078 transitions. [2021-08-21 17:48:16,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 4078 transitions. [2021-08-21 17:48:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:16,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:16,884 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:16,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:17,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:17,085 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash 961666388, now seen corresponding path program 184 times [2021-08-21 17:48:17,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:17,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205139193] [2021-08-21 17:48:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:17,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:17,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:17,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205139193] [2021-08-21 17:48:17,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205139193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:17,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141755909] [2021-08-21 17:48:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:48:17,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:17,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:17,147 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:17,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 17:48:18,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:48:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:19,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141755909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:19,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:19,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:48:19,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141047806] [2021-08-21 17:48:19,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:48:19,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:48:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:48:19,018 INFO L87 Difference]: Start difference. First operand 1861 states and 4078 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:48:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:19,091 INFO L93 Difference]: Finished difference Result 1909 states and 4115 transitions. [2021-08-21 17:48:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:48:19,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:48:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:19,093 INFO L225 Difference]: With dead ends: 1909 [2021-08-21 17:48:19,093 INFO L226 Difference]: Without dead ends: 1909 [2021-08-21 17:48:19,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-08-21 17:48:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1848. [2021-08-21 17:48:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.189496480779643) internal successors, (4044), 1847 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4044 transitions. [2021-08-21 17:48:19,114 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4044 transitions. Word has length 21 [2021-08-21 17:48:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:19,115 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 4044 transitions. [2021-08-21 17:48:19,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:48:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4044 transitions. [2021-08-21 17:48:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:19,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:19,116 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:19,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2021-08-21 17:48:19,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-21 17:48:19,317 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash -111418992, now seen corresponding path program 185 times [2021-08-21 17:48:19,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:19,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920919781] [2021-08-21 17:48:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:19,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:19,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:19,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920919781] [2021-08-21 17:48:19,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920919781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:19,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711933945] [2021-08-21 17:48:19,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:48:19,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:19,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:19,386 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:19,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 17:48:21,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:48:21,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:21,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711933945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:21,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:21,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:48:21,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147902704] [2021-08-21 17:48:21,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:48:21,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:48:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:48:21,294 INFO L87 Difference]: Start difference. First operand 1848 states and 4044 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:21,374 INFO L93 Difference]: Finished difference Result 2060 states and 4417 transitions. [2021-08-21 17:48:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:48:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:48:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:21,377 INFO L225 Difference]: With dead ends: 2060 [2021-08-21 17:48:21,377 INFO L226 Difference]: Without dead ends: 2060 [2021-08-21 17:48:21,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:48:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-08-21 17:48:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1848. [2021-08-21 17:48:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.1867893881970764) internal successors, (4039), 1847 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4039 transitions. [2021-08-21 17:48:21,397 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4039 transitions. Word has length 21 [2021-08-21 17:48:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:21,397 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 4039 transitions. [2021-08-21 17:48:21,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4039 transitions. [2021-08-21 17:48:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:21,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:21,399 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:21,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-21 17:48:21,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 17:48:21,608 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 982672596, now seen corresponding path program 186 times [2021-08-21 17:48:21,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:21,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239878529] [2021-08-21 17:48:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:21,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:21,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:21,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239878529] [2021-08-21 17:48:21,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239878529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:21,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207814789] [2021-08-21 17:48:21,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:48:21,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:21,682 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:21,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 17:48:23,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:48:23,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:23,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:23,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207814789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:23,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:23,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:48:23,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837368101] [2021-08-21 17:48:23,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:23,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:23,588 INFO L87 Difference]: Start difference. First operand 1848 states and 4039 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:23,706 INFO L93 Difference]: Finished difference Result 2168 states and 4627 transitions. [2021-08-21 17:48:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:48:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:23,708 INFO L225 Difference]: With dead ends: 2168 [2021-08-21 17:48:23,708 INFO L226 Difference]: Without dead ends: 2168 [2021-08-21 17:48:23,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:48:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-08-21 17:48:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1774. [2021-08-21 17:48:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.183869148336153) internal successors, (3872), 1773 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 3872 transitions. [2021-08-21 17:48:23,729 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 3872 transitions. Word has length 21 [2021-08-21 17:48:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:23,730 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 3872 transitions. [2021-08-21 17:48:23,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 3872 transitions. [2021-08-21 17:48:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:23,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:23,731 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:23,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-21 17:48:23,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 17:48:23,933 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 539773456, now seen corresponding path program 187 times [2021-08-21 17:48:23,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:23,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113335646] [2021-08-21 17:48:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:23,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:24,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:24,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113335646] [2021-08-21 17:48:24,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113335646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:24,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582637916] [2021-08-21 17:48:24,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:48:24,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:24,009 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:24,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 17:48:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:25,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:25,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:25,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582637916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:25,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:25,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:48:25,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392508810] [2021-08-21 17:48:25,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:25,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:25,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:25,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:25,919 INFO L87 Difference]: Start difference. First operand 1774 states and 3872 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:26,076 INFO L93 Difference]: Finished difference Result 3143 states and 6679 transitions. [2021-08-21 17:48:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:48:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:26,080 INFO L225 Difference]: With dead ends: 3143 [2021-08-21 17:48:26,080 INFO L226 Difference]: Without dead ends: 3143 [2021-08-21 17:48:26,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:48:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-08-21 17:48:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 1891. [2021-08-21 17:48:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 2.1857142857142855) internal successors, (4131), 1890 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 4131 transitions. [2021-08-21 17:48:26,106 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 4131 transitions. Word has length 21 [2021-08-21 17:48:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:26,106 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 4131 transitions. [2021-08-21 17:48:26,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 4131 transitions. [2021-08-21 17:48:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:26,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:26,108 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:26,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-21 17:48:26,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:26,309 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 508251062, now seen corresponding path program 188 times [2021-08-21 17:48:26,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:26,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638442485] [2021-08-21 17:48:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:26,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:26,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:26,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638442485] [2021-08-21 17:48:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638442485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:26,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803096151] [2021-08-21 17:48:26,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:48:26,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:26,369 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:26,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 17:48:28,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:48:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:48:28,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803096151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:28,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:28,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:28,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958658632] [2021-08-21 17:48:28,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:28,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:28,288 INFO L87 Difference]: Start difference. First operand 1891 states and 4131 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:28,363 INFO L93 Difference]: Finished difference Result 1977 states and 4263 transitions. [2021-08-21 17:48:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:48:28,363 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:28,365 INFO L225 Difference]: With dead ends: 1977 [2021-08-21 17:48:28,365 INFO L226 Difference]: Without dead ends: 1976 [2021-08-21 17:48:28,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:48:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-08-21 17:48:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1914. [2021-08-21 17:48:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.1860951385258756) internal successors, (4182), 1913 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 4182 transitions. [2021-08-21 17:48:28,386 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 4182 transitions. Word has length 21 [2021-08-21 17:48:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:28,386 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 4182 transitions. [2021-08-21 17:48:28,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 4182 transitions. [2021-08-21 17:48:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:28,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:28,388 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:28,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-21 17:48:28,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:28,589 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:28,589 INFO L82 PathProgramCache]: Analyzing trace with hash -411449646, now seen corresponding path program 189 times [2021-08-21 17:48:28,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:28,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516182892] [2021-08-21 17:48:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:28,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:28,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:28,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516182892] [2021-08-21 17:48:28,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516182892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:28,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915877237] [2021-08-21 17:48:28,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:48:28,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:28,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:28,657 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:28,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 17:48:30,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:48:30,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:30,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:48:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915877237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:30,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:30,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:30,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741769065] [2021-08-21 17:48:30,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:30,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:30,575 INFO L87 Difference]: Start difference. First operand 1914 states and 4182 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:30,630 INFO L93 Difference]: Finished difference Result 2028 states and 4396 transitions. [2021-08-21 17:48:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:48:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:30,632 INFO L225 Difference]: With dead ends: 2028 [2021-08-21 17:48:30,632 INFO L226 Difference]: Without dead ends: 2027 [2021-08-21 17:48:30,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:48:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-08-21 17:48:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1907. [2021-08-21 17:48:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 2.185729275970619) internal successors, (4166), 1906 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 4166 transitions. [2021-08-21 17:48:30,651 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 4166 transitions. Word has length 21 [2021-08-21 17:48:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:30,652 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 4166 transitions. [2021-08-21 17:48:30,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 4166 transitions. [2021-08-21 17:48:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:30,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:30,653 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:30,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-21 17:48:30,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:30,854 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:30,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1220796272, now seen corresponding path program 190 times [2021-08-21 17:48:30,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:30,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224448323] [2021-08-21 17:48:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:30,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:30,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:30,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224448323] [2021-08-21 17:48:30,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224448323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:30,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885792274] [2021-08-21 17:48:30,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:48:30,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:30,910 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:30,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 17:48:32,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:48:32,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:32,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:32,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885792274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:32,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:32,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:32,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870470345] [2021-08-21 17:48:32,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:32,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:32,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:32,819 INFO L87 Difference]: Start difference. First operand 1907 states and 4166 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:32,874 INFO L93 Difference]: Finished difference Result 2020 states and 4344 transitions. [2021-08-21 17:48:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:48:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:32,876 INFO L225 Difference]: With dead ends: 2020 [2021-08-21 17:48:32,876 INFO L226 Difference]: Without dead ends: 2020 [2021-08-21 17:48:32,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-08-21 17:48:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1907. [2021-08-21 17:48:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 2.185729275970619) internal successors, (4166), 1906 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 4166 transitions. [2021-08-21 17:48:32,897 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 4166 transitions. Word has length 21 [2021-08-21 17:48:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:32,897 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 4166 transitions. [2021-08-21 17:48:32,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 4166 transitions. [2021-08-21 17:48:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:32,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:32,899 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:32,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2021-08-21 17:48:33,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-08-21 17:48:33,099 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash 268608724, now seen corresponding path program 191 times [2021-08-21 17:48:33,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:33,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877295257] [2021-08-21 17:48:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:33,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:33,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:33,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877295257] [2021-08-21 17:48:33,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877295257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:33,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834800635] [2021-08-21 17:48:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:48:33,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:33,168 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:33,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 17:48:35,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:48:35,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:35,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834800635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:35,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:35,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:48:35,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356212525] [2021-08-21 17:48:35,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:48:35,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:48:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:48:35,193 INFO L87 Difference]: Start difference. First operand 1907 states and 4166 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:48:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:35,259 INFO L93 Difference]: Finished difference Result 2044 states and 4388 transitions. [2021-08-21 17:48:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:48:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:48:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:35,262 INFO L225 Difference]: With dead ends: 2044 [2021-08-21 17:48:35,262 INFO L226 Difference]: Without dead ends: 2044 [2021-08-21 17:48:35,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:48:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-08-21 17:48:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1902. [2021-08-21 17:48:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.184113624408206) internal successors, (4152), 1901 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 4152 transitions. [2021-08-21 17:48:35,284 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 4152 transitions. Word has length 21 [2021-08-21 17:48:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:35,284 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 4152 transitions. [2021-08-21 17:48:35,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:48:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 4152 transitions. [2021-08-21 17:48:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:35,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:35,286 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:35,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-21 17:48:35,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:35,487 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash -804476656, now seen corresponding path program 192 times [2021-08-21 17:48:35,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:35,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639088723] [2021-08-21 17:48:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:35,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:35,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:35,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639088723] [2021-08-21 17:48:35,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639088723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:35,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189031060] [2021-08-21 17:48:35,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:48:35,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:35,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:35,555 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:35,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 17:48:37,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:48:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:37,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:37,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189031060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:37,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:37,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:48:37,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304410087] [2021-08-21 17:48:37,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:48:37,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:48:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:48:37,509 INFO L87 Difference]: Start difference. First operand 1902 states and 4152 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:37,568 INFO L93 Difference]: Finished difference Result 1939 states and 4176 transitions. [2021-08-21 17:48:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:48:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:48:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:37,571 INFO L225 Difference]: With dead ends: 1939 [2021-08-21 17:48:37,571 INFO L226 Difference]: Without dead ends: 1939 [2021-08-21 17:48:37,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:48:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-08-21 17:48:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1877. [2021-08-21 17:48:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.181236673773987) internal successors, (4092), 1876 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 4092 transitions. [2021-08-21 17:48:37,591 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 4092 transitions. Word has length 21 [2021-08-21 17:48:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:37,591 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 4092 transitions. [2021-08-21 17:48:37,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 4092 transitions. [2021-08-21 17:48:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:37,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:37,593 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:37,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-21 17:48:37,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:37,794 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:37,794 INFO L82 PathProgramCache]: Analyzing trace with hash 289614932, now seen corresponding path program 193 times [2021-08-21 17:48:37,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:37,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168280027] [2021-08-21 17:48:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:37,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:37,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:37,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168280027] [2021-08-21 17:48:37,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168280027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:37,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355728120] [2021-08-21 17:48:37,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:48:37,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:37,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:37,866 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:37,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 17:48:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355728120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:39,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:39,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:48:39,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055472260] [2021-08-21 17:48:39,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:39,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:39,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:39,808 INFO L87 Difference]: Start difference. First operand 1877 states and 4092 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:39,902 INFO L93 Difference]: Finished difference Result 2118 states and 4533 transitions. [2021-08-21 17:48:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:48:39,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:39,904 INFO L225 Difference]: With dead ends: 2118 [2021-08-21 17:48:39,904 INFO L226 Difference]: Without dead ends: 2118 [2021-08-21 17:48:39,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:48:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-08-21 17:48:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1868. [2021-08-21 17:48:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.1767541510444564) internal successors, (4064), 1867 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 4064 transitions. [2021-08-21 17:48:39,924 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 4064 transitions. Word has length 21 [2021-08-21 17:48:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:39,924 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 4064 transitions. [2021-08-21 17:48:39,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 4064 transitions. [2021-08-21 17:48:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:39,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:39,925 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:39,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-21 17:48:40,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:40,126 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:40,126 INFO L82 PathProgramCache]: Analyzing trace with hash -153284208, now seen corresponding path program 194 times [2021-08-21 17:48:40,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:40,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134112017] [2021-08-21 17:48:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:40,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:40,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:40,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134112017] [2021-08-21 17:48:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134112017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:40,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336700336] [2021-08-21 17:48:40,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:48:40,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:40,200 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:40,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 17:48:42,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:48:42,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:42,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:42,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336700336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:42,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:42,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:48:42,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333255728] [2021-08-21 17:48:42,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:42,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:42,137 INFO L87 Difference]: Start difference. First operand 1868 states and 4064 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:42,241 INFO L93 Difference]: Finished difference Result 3400 states and 7226 transitions. [2021-08-21 17:48:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:48:42,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:42,245 INFO L225 Difference]: With dead ends: 3400 [2021-08-21 17:48:42,245 INFO L226 Difference]: Without dead ends: 3400 [2021-08-21 17:48:42,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:48:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-08-21 17:48:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 1922. [2021-08-21 17:48:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 2.1717855283706404) internal successors, (4172), 1921 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 4172 transitions. [2021-08-21 17:48:42,274 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 4172 transitions. Word has length 21 [2021-08-21 17:48:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:42,274 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 4172 transitions. [2021-08-21 17:48:42,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 4172 transitions. [2021-08-21 17:48:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:42,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:42,276 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:42,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:42,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:42,476 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -998255660, now seen corresponding path program 195 times [2021-08-21 17:48:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:42,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034481227] [2021-08-21 17:48:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:42,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:42,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:42,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034481227] [2021-08-21 17:48:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034481227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:42,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775583132] [2021-08-21 17:48:42,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:48:42,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:42,554 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:42,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 17:48:44,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:48:44,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:44,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:44,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:44,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775583132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:44,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:44,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:48:44,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543140651] [2021-08-21 17:48:44,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:44,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:44,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:44,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:44,525 INFO L87 Difference]: Start difference. First operand 1922 states and 4172 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:44,712 INFO L93 Difference]: Finished difference Result 3229 states and 6806 transitions. [2021-08-21 17:48:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:48:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:44,715 INFO L225 Difference]: With dead ends: 3229 [2021-08-21 17:48:44,715 INFO L226 Difference]: Without dead ends: 3229 [2021-08-21 17:48:44,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:48:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2021-08-21 17:48:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2024. [2021-08-21 17:48:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.166584280771132) internal successors, (4383), 2023 states have internal predecessors, (4383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 4383 transitions. [2021-08-21 17:48:44,743 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 4383 transitions. Word has length 21 [2021-08-21 17:48:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:44,743 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 4383 transitions. [2021-08-21 17:48:44,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 4383 transitions. [2021-08-21 17:48:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:44,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:44,745 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:44,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-21 17:48:44,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 17:48:44,945 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash 224114512, now seen corresponding path program 196 times [2021-08-21 17:48:44,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:44,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633080837] [2021-08-21 17:48:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:44,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:45,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:45,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633080837] [2021-08-21 17:48:45,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633080837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:45,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248725963] [2021-08-21 17:48:45,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:48:45,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:45,010 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:45,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 17:48:46,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:48:46,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:46,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:46,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:46,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248725963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:46,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:46,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:48:46,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758796616] [2021-08-21 17:48:46,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:48:46,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:48:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:48:46,965 INFO L87 Difference]: Start difference. First operand 2024 states and 4383 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:47,086 INFO L93 Difference]: Finished difference Result 2075 states and 4430 transitions. [2021-08-21 17:48:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:48:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-08-21 17:48:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:47,089 INFO L225 Difference]: With dead ends: 2075 [2021-08-21 17:48:47,089 INFO L226 Difference]: Without dead ends: 2073 [2021-08-21 17:48:47,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:48:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-08-21 17:48:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2024. [2021-08-21 17:48:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.1660899653979238) internal successors, (4382), 2023 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 4382 transitions. [2021-08-21 17:48:47,109 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 4382 transitions. Word has length 21 [2021-08-21 17:48:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:47,109 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 4382 transitions. [2021-08-21 17:48:47,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 4382 transitions. [2021-08-21 17:48:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:47,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:47,111 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:47,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 17:48:47,312 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:47,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1778163636, now seen corresponding path program 197 times [2021-08-21 17:48:47,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:47,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400097518] [2021-08-21 17:48:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:47,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:47,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:47,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400097518] [2021-08-21 17:48:47,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400097518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:47,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143146599] [2021-08-21 17:48:47,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:48:47,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:47,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:47,376 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:47,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 17:48:49,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:48:49,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:49,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143146599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:49,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:49,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:48:49,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380823104] [2021-08-21 17:48:49,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:48:49,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:48:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:48:49,323 INFO L87 Difference]: Start difference. First operand 2024 states and 4382 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:49,404 INFO L93 Difference]: Finished difference Result 2115 states and 4548 transitions. [2021-08-21 17:48:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:48:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-08-21 17:48:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:49,407 INFO L225 Difference]: With dead ends: 2115 [2021-08-21 17:48:49,407 INFO L226 Difference]: Without dead ends: 2115 [2021-08-21 17:48:49,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:48:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-08-21 17:48:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 2030. [2021-08-21 17:48:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.1685559388861506) internal successors, (4400), 2029 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4400 transitions. [2021-08-21 17:48:49,427 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4400 transitions. Word has length 21 [2021-08-21 17:48:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:49,427 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 4400 transitions. [2021-08-21 17:48:49,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4400 transitions. [2021-08-21 17:48:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:49,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:49,428 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:49,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:49,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-21 17:48:49,629 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash 529822352, now seen corresponding path program 198 times [2021-08-21 17:48:49,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:49,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929102288] [2021-08-21 17:48:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:49,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:49,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:49,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929102288] [2021-08-21 17:48:49,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929102288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:49,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298823380] [2021-08-21 17:48:49,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:48:49,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:49,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:49,718 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:49,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 17:48:51,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:48:51,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:51,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298823380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:51,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:51,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:48:51,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913300041] [2021-08-21 17:48:51,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:48:51,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:48:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:48:51,678 INFO L87 Difference]: Start difference. First operand 2030 states and 4400 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:48:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:51,817 INFO L93 Difference]: Finished difference Result 2608 states and 5575 transitions. [2021-08-21 17:48:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:48:51,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 21 [2021-08-21 17:48:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:51,820 INFO L225 Difference]: With dead ends: 2608 [2021-08-21 17:48:51,820 INFO L226 Difference]: Without dead ends: 2608 [2021-08-21 17:48:51,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:48:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-08-21 17:48:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2195. [2021-08-21 17:48:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 2.1649954421148587) internal successors, (4750), 2194 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4750 transitions. [2021-08-21 17:48:51,844 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4750 transitions. Word has length 21 [2021-08-21 17:48:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:51,844 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 4750 transitions. [2021-08-21 17:48:51,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:48:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4750 transitions. [2021-08-21 17:48:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:51,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:51,846 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:51,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:52,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 17:48:52,047 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash 105511116, now seen corresponding path program 199 times [2021-08-21 17:48:52,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:52,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599107688] [2021-08-21 17:48:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:52,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:52,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:52,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599107688] [2021-08-21 17:48:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599107688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:52,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230685782] [2021-08-21 17:48:52,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:48:52,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:52,123 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:52,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 17:48:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:54,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:54,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:54,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230685782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:54,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:54,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:48:54,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137306847] [2021-08-21 17:48:54,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:54,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:54,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:54,094 INFO L87 Difference]: Start difference. First operand 2195 states and 4750 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:54,226 INFO L93 Difference]: Finished difference Result 2584 states and 5520 transitions. [2021-08-21 17:48:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:48:54,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:54,229 INFO L225 Difference]: With dead ends: 2584 [2021-08-21 17:48:54,229 INFO L226 Difference]: Without dead ends: 2584 [2021-08-21 17:48:54,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:48:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-08-21 17:48:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2006. [2021-08-21 17:48:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 2.170573566084788) internal successors, (4352), 2005 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 4352 transitions. [2021-08-21 17:48:54,252 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 4352 transitions. Word has length 21 [2021-08-21 17:48:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:54,252 INFO L470 AbstractCegarLoop]: Abstraction has 2006 states and 4352 transitions. [2021-08-21 17:48:54,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 4352 transitions. [2021-08-21 17:48:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:54,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:54,254 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:54,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-08-21 17:48:54,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:54,454 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:54,455 INFO L82 PathProgramCache]: Analyzing trace with hash -739460336, now seen corresponding path program 200 times [2021-08-21 17:48:54,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:54,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595283426] [2021-08-21 17:48:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:54,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:54,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:54,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595283426] [2021-08-21 17:48:54,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595283426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:54,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820438203] [2021-08-21 17:48:54,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:48:54,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:54,543 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:54,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 17:48:56,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:48:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:56,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:56,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:56,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820438203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:56,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:56,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:48:56,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733405197] [2021-08-21 17:48:56,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:48:56,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:48:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:48:56,525 INFO L87 Difference]: Start difference. First operand 2006 states and 4352 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:56,722 INFO L93 Difference]: Finished difference Result 2980 states and 6317 transitions. [2021-08-21 17:48:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:48:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:48:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:56,726 INFO L225 Difference]: With dead ends: 2980 [2021-08-21 17:48:56,726 INFO L226 Difference]: Without dead ends: 2980 [2021-08-21 17:48:56,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:48:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-08-21 17:48:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 1931. [2021-08-21 17:48:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.173575129533679) internal successors, (4195), 1930 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 4195 transitions. [2021-08-21 17:48:56,761 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 4195 transitions. Word has length 21 [2021-08-21 17:48:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:56,761 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 4195 transitions. [2021-08-21 17:48:56,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 4195 transitions. [2021-08-21 17:48:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:56,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:56,763 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:56,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-08-21 17:48:56,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-21 17:48:56,964 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash 498299958, now seen corresponding path program 201 times [2021-08-21 17:48:56,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:56,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457472720] [2021-08-21 17:48:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:56,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:57,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:57,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457472720] [2021-08-21 17:48:57,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457472720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:57,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768397738] [2021-08-21 17:48:57,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:48:57,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:57,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:57,020 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:57,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 17:48:58,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:48:58,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:48:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:48:59,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768397738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:59,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:59,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:48:59,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910690635] [2021-08-21 17:48:59,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:48:59,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:48:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:48:59,001 INFO L87 Difference]: Start difference. First operand 1931 states and 4195 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:59,065 INFO L93 Difference]: Finished difference Result 1971 states and 4245 transitions. [2021-08-21 17:48:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:48:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:48:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:59,067 INFO L225 Difference]: With dead ends: 1971 [2021-08-21 17:48:59,067 INFO L226 Difference]: Without dead ends: 1970 [2021-08-21 17:48:59,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:48:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-08-21 17:48:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1942. [2021-08-21 17:48:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.1741370427614632) internal successors, (4220), 1941 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 4220 transitions. [2021-08-21 17:48:59,086 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 4220 transitions. Word has length 21 [2021-08-21 17:48:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:59,086 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 4220 transitions. [2021-08-21 17:48:59,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 4220 transitions. [2021-08-21 17:48:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:48:59,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:59,088 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:59,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-08-21 17:48:59,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-21 17:48:59,289 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash -421400750, now seen corresponding path program 202 times [2021-08-21 17:48:59,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:59,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356433728] [2021-08-21 17:48:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:59,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:48:59,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:59,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356433728] [2021-08-21 17:48:59,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356433728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:59,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483366351] [2021-08-21 17:48:59,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:48:59,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:59,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:59,377 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:59,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 17:49:01,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:49:01,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:49:01,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483366351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:01,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:01,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:49:01,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998604074] [2021-08-21 17:49:01,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:49:01,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:49:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:49:01,396 INFO L87 Difference]: Start difference. First operand 1942 states and 4220 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:01,449 INFO L93 Difference]: Finished difference Result 2081 states and 4481 transitions. [2021-08-21 17:49:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:49:01,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:49:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:01,452 INFO L225 Difference]: With dead ends: 2081 [2021-08-21 17:49:01,452 INFO L226 Difference]: Without dead ends: 2081 [2021-08-21 17:49:01,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:49:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-08-21 17:49:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1966. [2021-08-21 17:49:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 2.1837150127226463) internal successors, (4291), 1965 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 4291 transitions. [2021-08-21 17:49:01,473 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 4291 transitions. Word has length 21 [2021-08-21 17:49:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:01,473 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 4291 transitions. [2021-08-21 17:49:01,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 4291 transitions. [2021-08-21 17:49:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:01,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:01,475 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:01,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-08-21 17:49:01,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:01,675 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1230747376, now seen corresponding path program 203 times [2021-08-21 17:49:01,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:01,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473496740] [2021-08-21 17:49:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:01,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:49:01,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:01,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473496740] [2021-08-21 17:49:01,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473496740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:01,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698206239] [2021-08-21 17:49:01,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:01,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:01,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:01,733 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:01,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 17:49:03,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:49:03,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:03,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:03,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:49:03,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698206239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:03,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:03,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:49:03,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197808792] [2021-08-21 17:49:03,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:49:03,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:49:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:49:03,772 INFO L87 Difference]: Start difference. First operand 1966 states and 4291 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:03,835 INFO L93 Difference]: Finished difference Result 2055 states and 4437 transitions. [2021-08-21 17:49:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:49:03,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-21 17:49:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:03,838 INFO L225 Difference]: With dead ends: 2055 [2021-08-21 17:49:03,838 INFO L226 Difference]: Without dead ends: 2055 [2021-08-21 17:49:03,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-08-21 17:49:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1967. [2021-08-21 17:49:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 2.1836215666327567) internal successors, (4293), 1966 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 4293 transitions. [2021-08-21 17:49:03,860 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 4293 transitions. Word has length 21 [2021-08-21 17:49:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:03,860 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 4293 transitions. [2021-08-21 17:49:03,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 4293 transitions. [2021-08-21 17:49:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:03,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:03,862 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:03,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:04,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-08-21 17:49:04,062 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash 258657620, now seen corresponding path program 204 times [2021-08-21 17:49:04,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:04,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379033173] [2021-08-21 17:49:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:04,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:04,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:04,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379033173] [2021-08-21 17:49:04,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379033173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:04,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377907985] [2021-08-21 17:49:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:49:04,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:04,126 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:04,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 17:49:06,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:49:06,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:06,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:06,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:06,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377907985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:06,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:06,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:49:06,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451101609] [2021-08-21 17:49:06,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:49:06,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:06,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:49:06,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:49:06,158 INFO L87 Difference]: Start difference. First operand 1967 states and 4293 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:06,234 INFO L93 Difference]: Finished difference Result 2100 states and 4527 transitions. [2021-08-21 17:49:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:49:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:49:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:06,237 INFO L225 Difference]: With dead ends: 2100 [2021-08-21 17:49:06,237 INFO L226 Difference]: Without dead ends: 2100 [2021-08-21 17:49:06,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:49:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-08-21 17:49:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1968. [2021-08-21 17:49:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 2.1835282155566853) internal successors, (4295), 1967 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 4295 transitions. [2021-08-21 17:49:06,260 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 4295 transitions. Word has length 21 [2021-08-21 17:49:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:06,260 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 4295 transitions. [2021-08-21 17:49:06,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 4295 transitions. [2021-08-21 17:49:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:06,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:06,262 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:06,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2021-08-21 17:49:06,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:06,463 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash -814427760, now seen corresponding path program 205 times [2021-08-21 17:49:06,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:06,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758232119] [2021-08-21 17:49:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:06,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:06,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:06,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758232119] [2021-08-21 17:49:06,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758232119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:06,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609607805] [2021-08-21 17:49:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:49:06,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:06,529 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:06,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 17:49:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:08,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609607805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:08,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:08,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:49:08,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575002771] [2021-08-21 17:49:08,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:49:08,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:49:08,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:49:08,545 INFO L87 Difference]: Start difference. First operand 1968 states and 4295 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:08,637 INFO L93 Difference]: Finished difference Result 2106 states and 4536 transitions. [2021-08-21 17:49:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:49:08,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:49:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:08,640 INFO L225 Difference]: With dead ends: 2106 [2021-08-21 17:49:08,640 INFO L226 Difference]: Without dead ends: 2106 [2021-08-21 17:49:08,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:49:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-08-21 17:49:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1960. [2021-08-21 17:49:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 2.1827462991322104) internal successors, (4276), 1959 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 4276 transitions. [2021-08-21 17:49:08,662 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 4276 transitions. Word has length 21 [2021-08-21 17:49:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:08,662 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 4276 transitions. [2021-08-21 17:49:08,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 4276 transitions. [2021-08-21 17:49:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:08,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:08,664 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:08,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:08,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-21 17:49:08,864 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash 279663828, now seen corresponding path program 206 times [2021-08-21 17:49:08,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:08,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126844917] [2021-08-21 17:49:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:08,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:08,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:08,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126844917] [2021-08-21 17:49:08,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126844917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:08,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633168491] [2021-08-21 17:49:08,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:08,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:08,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:08,957 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:08,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 17:49:10,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:10,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633168491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:10,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:10,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:49:10,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046875717] [2021-08-21 17:49:10,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:49:10,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:49:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:49:10,986 INFO L87 Difference]: Start difference. First operand 1960 states and 4276 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:11,051 INFO L93 Difference]: Finished difference Result 1981 states and 4256 transitions. [2021-08-21 17:49:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:49:11,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:49:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:11,054 INFO L225 Difference]: With dead ends: 1981 [2021-08-21 17:49:11,054 INFO L226 Difference]: Without dead ends: 1981 [2021-08-21 17:49:11,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:49:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-08-21 17:49:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1773. [2021-08-21 17:49:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 2.18058690744921) internal successors, (3864), 1772 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 3864 transitions. [2021-08-21 17:49:11,075 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 3864 transitions. Word has length 21 [2021-08-21 17:49:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:11,075 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 3864 transitions. [2021-08-21 17:49:11,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 3864 transitions. [2021-08-21 17:49:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:11,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:11,077 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:11,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2021-08-21 17:49:11,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 17:49:11,278 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash -163235312, now seen corresponding path program 207 times [2021-08-21 17:49:11,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:11,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508152310] [2021-08-21 17:49:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:11,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:11,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:11,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508152310] [2021-08-21 17:49:11,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508152310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:11,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811355205] [2021-08-21 17:49:11,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:49:11,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:11,353 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:11,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 17:49:13,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:49:13,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:13,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811355205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:13,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:13,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:13,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035240733] [2021-08-21 17:49:13,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:13,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:13,398 INFO L87 Difference]: Start difference. First operand 1773 states and 3864 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:13,511 INFO L93 Difference]: Finished difference Result 2087 states and 4466 transitions. [2021-08-21 17:49:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:49:13,511 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 21 [2021-08-21 17:49:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:13,514 INFO L225 Difference]: With dead ends: 2087 [2021-08-21 17:49:13,514 INFO L226 Difference]: Without dead ends: 2087 [2021-08-21 17:49:13,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:49:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-08-21 17:49:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1344. [2021-08-21 17:49:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.208488458674609) internal successors, (2966), 1343 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 2966 transitions. [2021-08-21 17:49:13,530 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 2966 transitions. Word has length 21 [2021-08-21 17:49:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:13,530 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 2966 transitions. [2021-08-21 17:49:13,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 2966 transitions. [2021-08-21 17:49:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:13,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:13,531 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:13,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:13,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-21 17:49:13,732 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1008206764, now seen corresponding path program 208 times [2021-08-21 17:49:13,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:13,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69713690] [2021-08-21 17:49:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:13,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:13,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:13,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69713690] [2021-08-21 17:49:13,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69713690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:13,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101631058] [2021-08-21 17:49:13,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:49:13,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:13,809 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:13,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 17:49:15,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:49:15,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:15,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101631058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:15,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:15,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:15,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031763211] [2021-08-21 17:49:15,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:15,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:15,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:15,874 INFO L87 Difference]: Start difference. First operand 1344 states and 2966 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:15,999 INFO L93 Difference]: Finished difference Result 2156 states and 4605 transitions. [2021-08-21 17:49:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:49:16,000 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 21 [2021-08-21 17:49:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:16,002 INFO L225 Difference]: With dead ends: 2156 [2021-08-21 17:49:16,002 INFO L226 Difference]: Without dead ends: 2156 [2021-08-21 17:49:16,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:49:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-08-21 17:49:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1742. [2021-08-21 17:49:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1741 states have (on average 2.176335439402642) internal successors, (3789), 1741 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 3789 transitions. [2021-08-21 17:49:16,024 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 3789 transitions. Word has length 21 [2021-08-21 17:49:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:16,024 INFO L470 AbstractCegarLoop]: Abstraction has 1742 states and 3789 transitions. [2021-08-21 17:49:16,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 3789 transitions. [2021-08-21 17:49:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:16,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:16,026 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:16,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-08-21 17:49:16,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 17:49:16,227 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1432518000, now seen corresponding path program 209 times [2021-08-21 17:49:16,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:16,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685400731] [2021-08-21 17:49:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:16,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:16,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:16,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685400731] [2021-08-21 17:49:16,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685400731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:16,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544147886] [2021-08-21 17:49:16,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:16,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:16,308 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:16,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 17:49:18,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:49:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:18,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544147886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:18,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:18,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:18,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038209815] [2021-08-21 17:49:18,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:18,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:18,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:18,357 INFO L87 Difference]: Start difference. First operand 1742 states and 3789 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:18,576 INFO L93 Difference]: Finished difference Result 2714 states and 5731 transitions. [2021-08-21 17:49:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:49:18,577 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 21 [2021-08-21 17:49:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:18,579 INFO L225 Difference]: With dead ends: 2714 [2021-08-21 17:49:18,579 INFO L226 Difference]: Without dead ends: 2714 [2021-08-21 17:49:18,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:49:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-08-21 17:49:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2111. [2021-08-21 17:49:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 2.148341232227488) internal successors, (4533), 2110 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 4533 transitions. [2021-08-21 17:49:18,604 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 4533 transitions. Word has length 21 [2021-08-21 17:49:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:18,604 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 4533 transitions. [2021-08-21 17:49:18,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 4533 transitions. [2021-08-21 17:49:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:18,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:18,606 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:18,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-21 17:49:18,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 17:49:18,806 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:18,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:18,806 INFO L82 PathProgramCache]: Analyzing trace with hash -343165036, now seen corresponding path program 210 times [2021-08-21 17:49:18,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:18,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179370901] [2021-08-21 17:49:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:18,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:18,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:18,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179370901] [2021-08-21 17:49:18,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179370901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:18,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962254329] [2021-08-21 17:49:18,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:49:18,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:18,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:18,873 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:18,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 17:49:20,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:49:20,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:20,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962254329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:20,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:20,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:49:20,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487925394] [2021-08-21 17:49:20,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:49:20,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:20,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:49:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:49:20,910 INFO L87 Difference]: Start difference. First operand 2111 states and 4533 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:49:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:21,031 INFO L93 Difference]: Finished difference Result 2190 states and 4626 transitions. [2021-08-21 17:49:21,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:49:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 21 [2021-08-21 17:49:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:21,034 INFO L225 Difference]: With dead ends: 2190 [2021-08-21 17:49:21,034 INFO L226 Difference]: Without dead ends: 2188 [2021-08-21 17:49:21,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:49:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-08-21 17:49:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 2122. [2021-08-21 17:49:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 2.1504007543611503) internal successors, (4561), 2121 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 4561 transitions. [2021-08-21 17:49:21,076 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 4561 transitions. Word has length 21 [2021-08-21 17:49:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:21,076 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 4561 transitions. [2021-08-21 17:49:21,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:49:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 4561 transitions. [2021-08-21 17:49:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:21,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:21,078 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:21,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-21 17:49:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-21 17:49:21,279 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1210884088, now seen corresponding path program 211 times [2021-08-21 17:49:21,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:21,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194679410] [2021-08-21 17:49:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:21,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:21,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:21,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194679410] [2021-08-21 17:49:21,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194679410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:21,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014980611] [2021-08-21 17:49:21,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:49:21,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:21,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:21,349 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:21,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 17:49:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:23,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:23,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014980611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:23,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:23,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:49:23,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792764709] [2021-08-21 17:49:23,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:49:23,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:49:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:49:23,408 INFO L87 Difference]: Start difference. First operand 2122 states and 4561 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:49:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:23,494 INFO L93 Difference]: Finished difference Result 2278 states and 4880 transitions. [2021-08-21 17:49:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:49:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) Word has length 21 [2021-08-21 17:49:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:23,496 INFO L225 Difference]: With dead ends: 2278 [2021-08-21 17:49:23,497 INFO L226 Difference]: Without dead ends: 2278 [2021-08-21 17:49:23,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:49:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-08-21 17:49:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2129. [2021-08-21 17:49:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 2.151315789473684) internal successors, (4578), 2128 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 4578 transitions. [2021-08-21 17:49:23,519 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 4578 transitions. Word has length 21 [2021-08-21 17:49:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:23,519 INFO L470 AbstractCegarLoop]: Abstraction has 2129 states and 4578 transitions. [2021-08-21 17:49:23,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-08-21 17:49:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 4578 transitions. [2021-08-21 17:49:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:23,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:23,521 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:23,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:23,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:23,721 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash 161895124, now seen corresponding path program 212 times [2021-08-21 17:49:23,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:23,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421238636] [2021-08-21 17:49:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:23,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:23,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:23,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421238636] [2021-08-21 17:49:23,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421238636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:23,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664092873] [2021-08-21 17:49:23,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:23,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:23,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:23,784 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:23,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 17:49:25,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:25,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:25,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:25,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664092873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:25,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:25,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:49:25,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242068861] [2021-08-21 17:49:25,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:49:25,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:25,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:49:25,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:49:25,848 INFO L87 Difference]: Start difference. First operand 2129 states and 4578 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:25,910 INFO L93 Difference]: Finished difference Result 2237 states and 4734 transitions. [2021-08-21 17:49:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:49:25,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:49:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:25,913 INFO L225 Difference]: With dead ends: 2237 [2021-08-21 17:49:25,913 INFO L226 Difference]: Without dead ends: 2237 [2021-08-21 17:49:25,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:49:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-08-21 17:49:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2119. [2021-08-21 17:49:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.147780925401322) internal successors, (4549), 2118 states have internal predecessors, (4549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 4549 transitions. [2021-08-21 17:49:25,935 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 4549 transitions. Word has length 21 [2021-08-21 17:49:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:25,935 INFO L470 AbstractCegarLoop]: Abstraction has 2119 states and 4549 transitions. [2021-08-21 17:49:25,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 4549 transitions. [2021-08-21 17:49:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:25,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:25,937 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:25,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:26,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:26,138 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1306739884, now seen corresponding path program 213 times [2021-08-21 17:49:26,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:26,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722359493] [2021-08-21 17:49:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:26,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:26,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:26,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722359493] [2021-08-21 17:49:26,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722359493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:26,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689983532] [2021-08-21 17:49:26,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:49:26,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:26,234 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:26,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 17:49:28,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:49:28,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:28,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:28,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:28,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689983532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:28,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:28,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:49:28,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640707002] [2021-08-21 17:49:28,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:49:28,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:49:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:49:28,278 INFO L87 Difference]: Start difference. First operand 2119 states and 4549 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:28,446 INFO L93 Difference]: Finished difference Result 2559 states and 5427 transitions. [2021-08-21 17:49:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:49:28,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:49:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:28,449 INFO L225 Difference]: With dead ends: 2559 [2021-08-21 17:49:28,449 INFO L226 Difference]: Without dead ends: 2559 [2021-08-21 17:49:28,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:49:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2021-08-21 17:49:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2233. [2021-08-21 17:49:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 2.142921146953405) internal successors, (4783), 2232 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 4783 transitions. [2021-08-21 17:49:28,473 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 4783 transitions. Word has length 21 [2021-08-21 17:49:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:28,473 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 4783 transitions. [2021-08-21 17:49:28,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 4783 transitions. [2021-08-21 17:49:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:28,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:28,475 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:28,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-21 17:49:28,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-21 17:49:28,676 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1575486312, now seen corresponding path program 214 times [2021-08-21 17:49:28,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:28,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095758985] [2021-08-21 17:49:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:28,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:28,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:28,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095758985] [2021-08-21 17:49:28,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095758985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:28,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791932522] [2021-08-21 17:49:28,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:49:28,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:28,751 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:28,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 17:49:30,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:49:30,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:30,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:30,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791932522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:30,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:30,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:30,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131552843] [2021-08-21 17:49:30,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:30,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:30,825 INFO L87 Difference]: Start difference. First operand 2233 states and 4783 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:30,972 INFO L93 Difference]: Finished difference Result 2565 states and 5440 transitions. [2021-08-21 17:49:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:49:30,973 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 21 [2021-08-21 17:49:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:30,975 INFO L225 Difference]: With dead ends: 2565 [2021-08-21 17:49:30,975 INFO L226 Difference]: Without dead ends: 2565 [2021-08-21 17:49:30,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:49:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-08-21 17:49:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 1434. [2021-08-21 17:49:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.1995812979762737) internal successors, (3152), 1433 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3152 transitions. [2021-08-21 17:49:30,993 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3152 transitions. Word has length 21 [2021-08-21 17:49:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:30,993 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 3152 transitions. [2021-08-21 17:49:30,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3152 transitions. [2021-08-21 17:49:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:30,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:30,994 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:31,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:31,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:31,195 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:31,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1999797548, now seen corresponding path program 215 times [2021-08-21 17:49:31,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:31,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348154970] [2021-08-21 17:49:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:31,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:31,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:31,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348154970] [2021-08-21 17:49:31,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348154970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:31,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639387413] [2021-08-21 17:49:31,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:31,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:31,279 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:31,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 17:49:33,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:49:33,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:33,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:33,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639387413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:33,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:33,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:33,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084041911] [2021-08-21 17:49:33,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:33,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:33,338 INFO L87 Difference]: Start difference. First operand 1434 states and 3152 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:33,547 INFO L93 Difference]: Finished difference Result 2064 states and 4410 transitions. [2021-08-21 17:49:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:49:33,547 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 21 [2021-08-21 17:49:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:33,549 INFO L225 Difference]: With dead ends: 2064 [2021-08-21 17:49:33,549 INFO L226 Difference]: Without dead ends: 2064 [2021-08-21 17:49:33,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:49:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-08-21 17:49:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1410. [2021-08-21 17:49:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 2.203690560681334) internal successors, (3105), 1409 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 3105 transitions. [2021-08-21 17:49:33,565 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 3105 transitions. Word has length 21 [2021-08-21 17:49:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:33,565 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 3105 transitions. [2021-08-21 17:49:33,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 3105 transitions. [2021-08-21 17:49:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:33,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:33,566 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:33,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-21 17:49:33,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-08-21 17:49:33,767 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash 189815734, now seen corresponding path program 216 times [2021-08-21 17:49:33,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:33,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133418609] [2021-08-21 17:49:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:33,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:33,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:33,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133418609] [2021-08-21 17:49:33,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133418609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:33,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493568] [2021-08-21 17:49:33,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:49:33,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:33,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:33,826 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:33,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 17:49:35,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:49:35,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:35,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:35,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:35,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:35,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:49:35,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683841789] [2021-08-21 17:49:35,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:49:35,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:49:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:49:35,889 INFO L87 Difference]: Start difference. First operand 1410 states and 3105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:35,979 INFO L93 Difference]: Finished difference Result 1472 states and 3176 transitions. [2021-08-21 17:49:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:49:35,980 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:49:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:35,981 INFO L225 Difference]: With dead ends: 1472 [2021-08-21 17:49:35,981 INFO L226 Difference]: Without dead ends: 1471 [2021-08-21 17:49:35,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:49:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-08-21 17:49:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1420. [2021-08-21 17:49:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 2.2064834390415786) internal successors, (3131), 1419 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 3131 transitions. [2021-08-21 17:49:35,995 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 3131 transitions. Word has length 21 [2021-08-21 17:49:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:35,996 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 3131 transitions. [2021-08-21 17:49:35,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 3131 transitions. [2021-08-21 17:49:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:35,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:35,997 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:36,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-21 17:49:36,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:36,197 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:36,198 INFO L82 PathProgramCache]: Analyzing trace with hash -729884974, now seen corresponding path program 217 times [2021-08-21 17:49:36,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:36,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54639681] [2021-08-21 17:49:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:36,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:36,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:36,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54639681] [2021-08-21 17:49:36,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54639681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:36,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282181095] [2021-08-21 17:49:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:49:36,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:36,262 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:36,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 17:49:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:38,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282181095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:38,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:38,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:49:38,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790428542] [2021-08-21 17:49:38,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:49:38,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:49:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:49:38,387 INFO L87 Difference]: Start difference. First operand 1420 states and 3131 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:38,443 INFO L93 Difference]: Finished difference Result 1741 states and 3775 transitions. [2021-08-21 17:49:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:49:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:49:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:38,446 INFO L225 Difference]: With dead ends: 1741 [2021-08-21 17:49:38,446 INFO L226 Difference]: Without dead ends: 1741 [2021-08-21 17:49:38,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:49:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-08-21 17:49:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1596. [2021-08-21 17:49:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 2.2081504702194357) internal successors, (3522), 1595 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 3522 transitions. [2021-08-21 17:49:38,462 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 3522 transitions. Word has length 21 [2021-08-21 17:49:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:38,462 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 3522 transitions. [2021-08-21 17:49:38,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 3522 transitions. [2021-08-21 17:49:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:38,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:38,464 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:38,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-21 17:49:38,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 17:49:38,665 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:38,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1539231600, now seen corresponding path program 218 times [2021-08-21 17:49:38,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:38,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677080480] [2021-08-21 17:49:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:38,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:38,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:38,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677080480] [2021-08-21 17:49:38,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677080480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:38,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920231129] [2021-08-21 17:49:38,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:38,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:38,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:38,726 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:38,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 17:49:40,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:40,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:40,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:40,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:40,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920231129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:40,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:40,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:49:40,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049514426] [2021-08-21 17:49:40,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:49:40,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:40,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:49:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:49:40,824 INFO L87 Difference]: Start difference. First operand 1596 states and 3522 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:40,904 INFO L93 Difference]: Finished difference Result 1704 states and 3682 transitions. [2021-08-21 17:49:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:49:40,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:49:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:40,906 INFO L225 Difference]: With dead ends: 1704 [2021-08-21 17:49:40,906 INFO L226 Difference]: Without dead ends: 1704 [2021-08-21 17:49:40,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:49:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2021-08-21 17:49:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1576. [2021-08-21 17:49:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.2044444444444444) internal successors, (3472), 1575 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3472 transitions. [2021-08-21 17:49:40,929 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3472 transitions. Word has length 21 [2021-08-21 17:49:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:40,929 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 3472 transitions. [2021-08-21 17:49:40,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3472 transitions. [2021-08-21 17:49:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:40,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:40,932 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:40,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-21 17:49:41,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 17:49:41,145 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash -49826604, now seen corresponding path program 219 times [2021-08-21 17:49:41,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:41,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864229938] [2021-08-21 17:49:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:41,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:41,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:41,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864229938] [2021-08-21 17:49:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864229938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:41,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25459338] [2021-08-21 17:49:41,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:49:41,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:41,206 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:41,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 17:49:43,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:49:43,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:43,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:43,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:49:43,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25459338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:43,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:43,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:49:43,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772387764] [2021-08-21 17:49:43,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:49:43,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:49:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:49:43,328 INFO L87 Difference]: Start difference. First operand 1576 states and 3472 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:43,410 INFO L93 Difference]: Finished difference Result 1682 states and 3663 transitions. [2021-08-21 17:49:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:49:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) Word has length 21 [2021-08-21 17:49:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:43,412 INFO L225 Difference]: With dead ends: 1682 [2021-08-21 17:49:43,412 INFO L226 Difference]: Without dead ends: 1682 [2021-08-21 17:49:43,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:49:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-08-21 17:49:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1591. [2021-08-21 17:49:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 2.2044025157232703) internal successors, (3505), 1590 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 3505 transitions. [2021-08-21 17:49:43,430 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 3505 transitions. Word has length 21 [2021-08-21 17:49:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:43,430 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 3505 transitions. [2021-08-21 17:49:43,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-08-21 17:49:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 3505 transitions. [2021-08-21 17:49:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:43,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:43,431 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:43,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-21 17:49:43,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 17:49:43,632 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1122911984, now seen corresponding path program 220 times [2021-08-21 17:49:43,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:43,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698801384] [2021-08-21 17:49:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:43,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:43,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:43,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698801384] [2021-08-21 17:49:43,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698801384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:43,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004222735] [2021-08-21 17:49:43,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:49:43,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:43,698 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:43,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 17:49:45,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:49:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:45,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004222735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:45,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:45,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:49:45,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181308198] [2021-08-21 17:49:45,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:49:45,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:45,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:49:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:49:45,822 INFO L87 Difference]: Start difference. First operand 1591 states and 3505 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:45,920 INFO L93 Difference]: Finished difference Result 1703 states and 3705 transitions. [2021-08-21 17:49:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:49:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:49:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:45,922 INFO L225 Difference]: With dead ends: 1703 [2021-08-21 17:49:45,922 INFO L226 Difference]: Without dead ends: 1703 [2021-08-21 17:49:45,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:49:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-08-21 17:49:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1534. [2021-08-21 17:49:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 2.20808871493803) internal successors, (3385), 1533 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 3385 transitions. [2021-08-21 17:49:45,938 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 3385 transitions. Word has length 21 [2021-08-21 17:49:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:45,938 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 3385 transitions. [2021-08-21 17:49:45,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 3385 transitions. [2021-08-21 17:49:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:45,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:45,939 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:45,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2021-08-21 17:49:46,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 17:49:46,140 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash -28820396, now seen corresponding path program 221 times [2021-08-21 17:49:46,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:46,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69038056] [2021-08-21 17:49:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:46,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:46,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:46,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69038056] [2021-08-21 17:49:46,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69038056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:46,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103065730] [2021-08-21 17:49:46,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:46,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:46,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:46,207 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:46,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 17:49:48,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:49:48,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:48,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:48,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:48,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103065730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:48,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:48,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:49:48,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767254089] [2021-08-21 17:49:48,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:49:48,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:48,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:49:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:49:48,342 INFO L87 Difference]: Start difference. First operand 1534 states and 3385 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:48,434 INFO L93 Difference]: Finished difference Result 1631 states and 3550 transitions. [2021-08-21 17:49:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:49:48,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:49:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:48,436 INFO L225 Difference]: With dead ends: 1631 [2021-08-21 17:49:48,437 INFO L226 Difference]: Without dead ends: 1631 [2021-08-21 17:49:48,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:49:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-08-21 17:49:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1335. [2021-08-21 17:49:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 2.230134932533733) internal successors, (2975), 1334 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2975 transitions. [2021-08-21 17:49:48,450 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2975 transitions. Word has length 21 [2021-08-21 17:49:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:48,450 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 2975 transitions. [2021-08-21 17:49:48,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2975 transitions. [2021-08-21 17:49:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:48,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:48,451 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:48,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2021-08-21 17:49:48,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:48,652 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:48,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:48,652 INFO L82 PathProgramCache]: Analyzing trace with hash -471719536, now seen corresponding path program 222 times [2021-08-21 17:49:48,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:48,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961439757] [2021-08-21 17:49:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:48,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:48,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:48,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961439757] [2021-08-21 17:49:48,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961439757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:48,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393186491] [2021-08-21 17:49:48,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:49:48,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:48,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:48,737 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:48,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 17:49:50,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:49:50,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:50,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:50,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393186491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:50,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:50,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:49:50,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250209467] [2021-08-21 17:49:50,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:49:50,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:50,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:49:50,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:49:50,896 INFO L87 Difference]: Start difference. First operand 1335 states and 2975 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:50,963 INFO L93 Difference]: Finished difference Result 1689 states and 3678 transitions. [2021-08-21 17:49:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:49:50,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:49:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:50,965 INFO L225 Difference]: With dead ends: 1689 [2021-08-21 17:49:50,965 INFO L226 Difference]: Without dead ends: 1689 [2021-08-21 17:49:50,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:49:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-08-21 17:49:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1655. [2021-08-21 17:49:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 2.1874244256348248) internal successors, (3618), 1654 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 3618 transitions. [2021-08-21 17:49:50,980 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 3618 transitions. Word has length 21 [2021-08-21 17:49:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:50,981 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 3618 transitions. [2021-08-21 17:49:50,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 3618 transitions. [2021-08-21 17:49:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:50,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:50,982 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:51,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2021-08-21 17:49:51,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:51,183 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:51,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1316690988, now seen corresponding path program 223 times [2021-08-21 17:49:51,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:51,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497327296] [2021-08-21 17:49:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:51,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:51,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:51,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497327296] [2021-08-21 17:49:51,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497327296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:51,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407281569] [2021-08-21 17:49:51,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:49:51,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:51,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:51,266 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:51,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 17:49:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:53,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407281569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:53,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:53,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:53,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970114810] [2021-08-21 17:49:53,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:53,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:53,427 INFO L87 Difference]: Start difference. First operand 1655 states and 3618 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:53,545 INFO L93 Difference]: Finished difference Result 1711 states and 3722 transitions. [2021-08-21 17:49:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:49:53,546 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 21 [2021-08-21 17:49:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:53,547 INFO L225 Difference]: With dead ends: 1711 [2021-08-21 17:49:53,547 INFO L226 Difference]: Without dead ends: 1711 [2021-08-21 17:49:53,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:49:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-08-21 17:49:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1619. [2021-08-21 17:49:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 2.1915945611866503) internal successors, (3546), 1618 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 3546 transitions. [2021-08-21 17:49:53,564 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 3546 transitions. Word has length 21 [2021-08-21 17:49:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:53,564 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 3546 transitions. [2021-08-21 17:49:53,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 3546 transitions. [2021-08-21 17:49:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:53,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:53,566 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:53,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:53,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-21 17:49:53,767 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:53,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1741002224, now seen corresponding path program 224 times [2021-08-21 17:49:53,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:53,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848853426] [2021-08-21 17:49:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:53,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:53,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:53,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848853426] [2021-08-21 17:49:53,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848853426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:53,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384584290] [2021-08-21 17:49:53,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:53,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:53,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:53,845 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:53,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 17:49:55,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:55,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:56,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384584290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:56,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:56,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:56,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108529895] [2021-08-21 17:49:56,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:56,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:56,005 INFO L87 Difference]: Start difference. First operand 1619 states and 3546 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:56,157 INFO L93 Difference]: Finished difference Result 1763 states and 3834 transitions. [2021-08-21 17:49:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:49:56,157 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 21 [2021-08-21 17:49:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:56,159 INFO L225 Difference]: With dead ends: 1763 [2021-08-21 17:49:56,159 INFO L226 Difference]: Without dead ends: 1763 [2021-08-21 17:49:56,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:49:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-08-21 17:49:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1698. [2021-08-21 17:49:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.1826753093694755) internal successors, (3704), 1697 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 3704 transitions. [2021-08-21 17:49:56,175 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 3704 transitions. Word has length 21 [2021-08-21 17:49:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:56,175 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 3704 transitions. [2021-08-21 17:49:56,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 3704 transitions. [2021-08-21 17:49:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:56,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:56,177 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:56,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:56,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 17:49:56,377 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2009748652, now seen corresponding path program 225 times [2021-08-21 17:49:56,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:56,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575704906] [2021-08-21 17:49:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:56,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:56,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:56,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575704906] [2021-08-21 17:49:56,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575704906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:56,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189915044] [2021-08-21 17:49:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:49:56,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:56,462 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:56,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 17:49:58,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:49:58,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:58,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:49:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:58,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189915044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:58,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:58,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:49:58,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554877137] [2021-08-21 17:49:58,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:58,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:58,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:58,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:58,641 INFO L87 Difference]: Start difference. First operand 1698 states and 3704 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:58,849 INFO L93 Difference]: Finished difference Result 1917 states and 4142 transitions. [2021-08-21 17:49:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:49:58,849 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 21 [2021-08-21 17:49:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:58,851 INFO L225 Difference]: With dead ends: 1917 [2021-08-21 17:49:58,851 INFO L226 Difference]: Without dead ends: 1917 [2021-08-21 17:49:58,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:49:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-08-21 17:49:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1722. [2021-08-21 17:49:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 2.1801278326554328) internal successors, (3752), 1721 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 3752 transitions. [2021-08-21 17:49:58,868 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 3752 transitions. Word has length 21 [2021-08-21 17:49:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:58,868 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 3752 transitions. [2021-08-21 17:49:58,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 3752 transitions. [2021-08-21 17:49:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:58,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:58,869 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:58,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2021-08-21 17:49:59,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:59,070 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash -748961840, now seen corresponding path program 226 times [2021-08-21 17:49:59,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:59,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136649275] [2021-08-21 17:49:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:59,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:59,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:59,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136649275] [2021-08-21 17:49:59,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136649275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:59,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035101314] [2021-08-21 17:49:59,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:49:59,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:59,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:59,200 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:59,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 17:50:01,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:50:01,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:01,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:01,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035101314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:01,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:01,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:50:01,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322059971] [2021-08-21 17:50:01,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:50:01,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:50:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:50:01,345 INFO L87 Difference]: Start difference. First operand 1722 states and 3752 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:01,491 INFO L93 Difference]: Finished difference Result 1808 states and 3852 transitions. [2021-08-21 17:50:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:50:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:50:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:01,493 INFO L225 Difference]: With dead ends: 1808 [2021-08-21 17:50:01,493 INFO L226 Difference]: Without dead ends: 1806 [2021-08-21 17:50:01,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:50:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-08-21 17:50:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1732. [2021-08-21 17:50:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 2.1796649335644136) internal successors, (3773), 1731 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 3773 transitions. [2021-08-21 17:50:01,511 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 3773 transitions. Word has length 21 [2021-08-21 17:50:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:01,511 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 3773 transitions. [2021-08-21 17:50:01,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 3773 transitions. [2021-08-21 17:50:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:01,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:01,512 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:01,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:01,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:01,713 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:01,713 INFO L82 PathProgramCache]: Analyzing trace with hash 805087284, now seen corresponding path program 227 times [2021-08-21 17:50:01,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:01,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812304787] [2021-08-21 17:50:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:01,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:01,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:01,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812304787] [2021-08-21 17:50:01,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812304787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:01,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503478748] [2021-08-21 17:50:01,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:50:01,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:01,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:01,841 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:01,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 17:50:04,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:50:04,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:04,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503478748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:04,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:04,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:50:04,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736747667] [2021-08-21 17:50:04,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:50:04,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:50:04,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:50:04,075 INFO L87 Difference]: Start difference. First operand 1732 states and 3773 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:04,166 INFO L93 Difference]: Finished difference Result 1902 states and 4124 transitions. [2021-08-21 17:50:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:50:04,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:50:04,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:04,169 INFO L225 Difference]: With dead ends: 1902 [2021-08-21 17:50:04,169 INFO L226 Difference]: Without dead ends: 1902 [2021-08-21 17:50:04,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:50:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-08-21 17:50:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1760. [2021-08-21 17:50:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.1881750994883458) internal successors, (3849), 1759 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 3849 transitions. [2021-08-21 17:50:04,187 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 3849 transitions. Word has length 21 [2021-08-21 17:50:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:04,188 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 3849 transitions. [2021-08-21 17:50:04,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 3849 transitions. [2021-08-21 17:50:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:04,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:04,189 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:04,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:04,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:04,390 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash -243901680, now seen corresponding path program 228 times [2021-08-21 17:50:04,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:04,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887827342] [2021-08-21 17:50:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:04,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:04,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:04,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887827342] [2021-08-21 17:50:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887827342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:04,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235395428] [2021-08-21 17:50:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:50:04,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:04,478 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:04,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 17:50:06,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:50:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:06,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:06,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235395428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:06,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:06,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:50:06,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139734040] [2021-08-21 17:50:06,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:50:06,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:50:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:50:06,769 INFO L87 Difference]: Start difference. First operand 1760 states and 3849 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:06,859 INFO L93 Difference]: Finished difference Result 1917 states and 4094 transitions. [2021-08-21 17:50:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:50:06,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:50:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:06,862 INFO L225 Difference]: With dead ends: 1917 [2021-08-21 17:50:06,862 INFO L226 Difference]: Without dead ends: 1917 [2021-08-21 17:50:06,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:50:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-08-21 17:50:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1768. [2021-08-21 17:50:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.1856253537068477) internal successors, (3862), 1767 states have internal predecessors, (3862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 3862 transitions. [2021-08-21 17:50:06,888 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 3862 transitions. Word has length 21 [2021-08-21 17:50:06,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:06,888 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 3862 transitions. [2021-08-21 17:50:06,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:06,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 3862 transitions. [2021-08-21 17:50:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:06,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:06,890 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:06,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:07,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 17:50:07,091 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash 172417936, now seen corresponding path program 229 times [2021-08-21 17:50:07,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:07,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050912861] [2021-08-21 17:50:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:07,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:07,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050912861] [2021-08-21 17:50:07,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050912861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879747193] [2021-08-21 17:50:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:50:07,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:07,198 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:07,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 17:50:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:09,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:09,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879747193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:09,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:09,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:50:09,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299485739] [2021-08-21 17:50:09,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:50:09,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:09,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:50:09,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:50:09,419 INFO L87 Difference]: Start difference. First operand 1768 states and 3862 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:09,490 INFO L93 Difference]: Finished difference Result 1927 states and 4129 transitions. [2021-08-21 17:50:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:50:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:50:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:09,492 INFO L225 Difference]: With dead ends: 1927 [2021-08-21 17:50:09,492 INFO L226 Difference]: Without dead ends: 1927 [2021-08-21 17:50:09,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:50:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-08-21 17:50:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1773. [2021-08-21 17:50:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 2.1845372460496613) internal successors, (3871), 1772 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 3871 transitions. [2021-08-21 17:50:09,510 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 3871 transitions. Word has length 21 [2021-08-21 17:50:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:09,510 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 3871 transitions. [2021-08-21 17:50:09,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 3871 transitions. [2021-08-21 17:50:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:09,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:09,511 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:09,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:09,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 17:50:09,713 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:09,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1889372944, now seen corresponding path program 230 times [2021-08-21 17:50:09,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:09,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733988655] [2021-08-21 17:50:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:09,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:09,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:09,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733988655] [2021-08-21 17:50:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733988655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:09,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556681458] [2021-08-21 17:50:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:50:09,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:09,799 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:09,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 17:50:11,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:50:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:11,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556681458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:11,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:11,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:50:11,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093024565] [2021-08-21 17:50:11,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:50:11,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:50:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:50:11,968 INFO L87 Difference]: Start difference. First operand 1773 states and 3871 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:12,163 INFO L93 Difference]: Finished difference Result 2159 states and 4638 transitions. [2021-08-21 17:50:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:50:12,164 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 21 [2021-08-21 17:50:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:12,166 INFO L225 Difference]: With dead ends: 2159 [2021-08-21 17:50:12,166 INFO L226 Difference]: Without dead ends: 2159 [2021-08-21 17:50:12,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:50:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2021-08-21 17:50:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 1843. [2021-08-21 17:50:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 2.179153094462541) internal successors, (4014), 1842 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 4014 transitions. [2021-08-21 17:50:12,189 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 4014 transitions. Word has length 21 [2021-08-21 17:50:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:12,189 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 4014 transitions. [2021-08-21 17:50:12,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 4014 transitions. [2021-08-21 17:50:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:12,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:12,190 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:12,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2021-08-21 17:50:12,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:12,391 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:12,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2146799028, now seen corresponding path program 231 times [2021-08-21 17:50:12,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:12,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512968985] [2021-08-21 17:50:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:12,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:12,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:12,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512968985] [2021-08-21 17:50:12,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512968985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:12,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123557466] [2021-08-21 17:50:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:50:12,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:12,478 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:12,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 17:50:14,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:50:14,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:14,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123557466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:14,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:14,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:50:14,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394097101] [2021-08-21 17:50:14,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:50:14,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:50:14,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:50:14,716 INFO L87 Difference]: Start difference. First operand 1843 states and 4014 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:14,902 INFO L93 Difference]: Finished difference Result 1950 states and 4228 transitions. [2021-08-21 17:50:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:50:14,902 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 21 [2021-08-21 17:50:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:14,904 INFO L225 Difference]: With dead ends: 1950 [2021-08-21 17:50:14,904 INFO L226 Difference]: Without dead ends: 1950 [2021-08-21 17:50:14,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:50:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-08-21 17:50:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1851. [2021-08-21 17:50:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1850 states have (on average 2.1783783783783783) internal successors, (4030), 1850 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 4030 transitions. [2021-08-21 17:50:14,924 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 4030 transitions. Word has length 21 [2021-08-21 17:50:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:14,924 INFO L470 AbstractCegarLoop]: Abstraction has 1851 states and 4030 transitions. [2021-08-21 17:50:14,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 4030 transitions. [2021-08-21 17:50:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:14,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:14,926 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:14,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2021-08-21 17:50:15,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 17:50:15,126 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1879421840, now seen corresponding path program 232 times [2021-08-21 17:50:15,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:15,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272858294] [2021-08-21 17:50:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:15,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:15,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:15,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272858294] [2021-08-21 17:50:15,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272858294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:15,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312367633] [2021-08-21 17:50:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:50:15,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:15,218 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:15,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 17:50:17,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:50:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312367633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:17,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:17,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:50:17,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904270968] [2021-08-21 17:50:17,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:50:17,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:50:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:50:17,418 INFO L87 Difference]: Start difference. First operand 1851 states and 4030 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:17,605 INFO L93 Difference]: Finished difference Result 2025 states and 4378 transitions. [2021-08-21 17:50:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:50:17,605 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 21 [2021-08-21 17:50:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:17,608 INFO L225 Difference]: With dead ends: 2025 [2021-08-21 17:50:17,608 INFO L226 Difference]: Without dead ends: 2025 [2021-08-21 17:50:17,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:50:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-08-21 17:50:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1856. [2021-08-21 17:50:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.1778975741239894) internal successors, (4040), 1855 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 4040 transitions. [2021-08-21 17:50:17,628 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 4040 transitions. Word has length 21 [2021-08-21 17:50:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:17,628 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 4040 transitions. [2021-08-21 17:50:17,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 4040 transitions. [2021-08-21 17:50:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:17,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:17,630 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:17,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:17,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-08-21 17:50:17,831 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash -783260618, now seen corresponding path program 233 times [2021-08-21 17:50:17,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:17,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015351106] [2021-08-21 17:50:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:17,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:17,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:17,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015351106] [2021-08-21 17:50:17,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015351106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:17,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754776057] [2021-08-21 17:50:17,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:50:17,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:17,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:17,907 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:17,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 17:50:20,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:50:20,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:20,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754776057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:20,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:20,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:50:20,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665234261] [2021-08-21 17:50:20,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:50:20,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:50:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:50:20,121 INFO L87 Difference]: Start difference. First operand 1856 states and 4040 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:20,226 INFO L93 Difference]: Finished difference Result 1927 states and 4121 transitions. [2021-08-21 17:50:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:50:20,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:50:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:20,229 INFO L225 Difference]: With dead ends: 1927 [2021-08-21 17:50:20,229 INFO L226 Difference]: Without dead ends: 1926 [2021-08-21 17:50:20,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:50:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-08-21 17:50:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1867. [2021-08-21 17:50:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.180600214362272) internal successors, (4069), 1866 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 4069 transitions. [2021-08-21 17:50:20,248 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 4069 transitions. Word has length 21 [2021-08-21 17:50:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:20,248 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 4069 transitions. [2021-08-21 17:50:20,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 4069 transitions. [2021-08-21 17:50:20,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:20,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:20,250 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:20,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2021-08-21 17:50:20,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 17:50:20,453 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:20,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1702961326, now seen corresponding path program 234 times [2021-08-21 17:50:20,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:20,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536309573] [2021-08-21 17:50:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:20,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:20,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:20,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536309573] [2021-08-21 17:50:20,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536309573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:20,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050121901] [2021-08-21 17:50:20,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:50:20,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:20,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:20,524 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:20,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 17:50:22,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:50:22,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:22,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050121901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:22,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:22,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:50:22,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743505459] [2021-08-21 17:50:22,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:50:22,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:22,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:50:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:50:22,747 INFO L87 Difference]: Start difference. First operand 1867 states and 4069 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:22,814 INFO L93 Difference]: Finished difference Result 2226 states and 4786 transitions. [2021-08-21 17:50:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:50:22,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:50:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:22,816 INFO L225 Difference]: With dead ends: 2226 [2021-08-21 17:50:22,816 INFO L226 Difference]: Without dead ends: 2226 [2021-08-21 17:50:22,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:50:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-08-21 17:50:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2109. [2021-08-21 17:50:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 2.1892789373814043) internal successors, (4615), 2108 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 4615 transitions. [2021-08-21 17:50:22,839 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 4615 transitions. Word has length 21 [2021-08-21 17:50:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:22,839 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 4615 transitions. [2021-08-21 17:50:22,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 4615 transitions. [2021-08-21 17:50:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:22,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:22,841 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:22,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2021-08-21 17:50:23,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-21 17:50:23,041 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1782659344, now seen corresponding path program 235 times [2021-08-21 17:50:23,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:23,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144709916] [2021-08-21 17:50:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:23,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:23,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:23,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144709916] [2021-08-21 17:50:23,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144709916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:23,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826571463] [2021-08-21 17:50:23,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:50:23,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:23,122 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:23,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 17:50:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:25,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:25,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826571463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:25,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:25,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:50:25,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024923840] [2021-08-21 17:50:25,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:50:25,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:50:25,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:50:25,374 INFO L87 Difference]: Start difference. First operand 2109 states and 4615 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:25,465 INFO L93 Difference]: Finished difference Result 2236 states and 4805 transitions. [2021-08-21 17:50:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:50:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:50:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:25,468 INFO L225 Difference]: With dead ends: 2236 [2021-08-21 17:50:25,468 INFO L226 Difference]: Without dead ends: 2236 [2021-08-21 17:50:25,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:50:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-08-21 17:50:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2115. [2021-08-21 17:50:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 2.1887417218543046) internal successors, (4627), 2114 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 4627 transitions. [2021-08-21 17:50:25,491 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 4627 transitions. Word has length 21 [2021-08-21 17:50:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 4627 transitions. [2021-08-21 17:50:25,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 4627 transitions. [2021-08-21 17:50:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:25,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:25,493 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:25,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:25,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:25,693 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1022902956, now seen corresponding path program 236 times [2021-08-21 17:50:25,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:25,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981133879] [2021-08-21 17:50:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:25,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:25,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:25,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981133879] [2021-08-21 17:50:25,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981133879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:25,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330996850] [2021-08-21 17:50:25,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:50:25,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:25,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:25,766 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:25,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 17:50:27,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:50:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:27,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330996850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:27,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:27,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:50:27,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630493475] [2021-08-21 17:50:27,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:50:27,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:27,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:50:27,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:50:27,988 INFO L87 Difference]: Start difference. First operand 2115 states and 4627 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:28,098 INFO L93 Difference]: Finished difference Result 2261 states and 4877 transitions. [2021-08-21 17:50:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:50:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:50:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:28,101 INFO L225 Difference]: With dead ends: 2261 [2021-08-21 17:50:28,101 INFO L226 Difference]: Without dead ends: 2261 [2021-08-21 17:50:28,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:50:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-08-21 17:50:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 2135. [2021-08-21 17:50:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.189784442361762) internal successors, (4673), 2134 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 4673 transitions. [2021-08-21 17:50:28,123 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 4673 transitions. Word has length 21 [2021-08-21 17:50:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:28,123 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 4673 transitions. [2021-08-21 17:50:28,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 4673 transitions. [2021-08-21 17:50:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:28,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:28,125 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:28,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:28,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:28,326 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2095988336, now seen corresponding path program 237 times [2021-08-21 17:50:28,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:28,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192868680] [2021-08-21 17:50:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:28,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:28,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:28,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192868680] [2021-08-21 17:50:28,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192868680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:28,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893017982] [2021-08-21 17:50:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:50:28,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:28,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:28,396 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:28,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 17:50:30,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:50:30,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:30,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:30,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:50:30,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893017982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:30,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:30,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:50:30,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126266945] [2021-08-21 17:50:30,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:50:30,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:50:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:50:30,640 INFO L87 Difference]: Start difference. First operand 2135 states and 4673 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:30,776 INFO L93 Difference]: Finished difference Result 2287 states and 4959 transitions. [2021-08-21 17:50:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:50:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-08-21 17:50:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:30,779 INFO L225 Difference]: With dead ends: 2287 [2021-08-21 17:50:30,779 INFO L226 Difference]: Without dead ends: 2287 [2021-08-21 17:50:30,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:50:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-08-21 17:50:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2209. [2021-08-21 17:50:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.186141304347826) internal successors, (4827), 2208 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 4827 transitions. [2021-08-21 17:50:30,802 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 4827 transitions. Word has length 21 [2021-08-21 17:50:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:30,802 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 4827 transitions. [2021-08-21 17:50:30,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 4827 transitions. [2021-08-21 17:50:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:30,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:30,804 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:30,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:31,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2021-08-21 17:50:31,005 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1001896748, now seen corresponding path program 238 times [2021-08-21 17:50:31,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:31,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177092848] [2021-08-21 17:50:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:31,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:31,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:31,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177092848] [2021-08-21 17:50:31,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177092848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:31,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877492910] [2021-08-21 17:50:31,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:50:31,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:31,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:31,084 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:31,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 17:50:33,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:50:33,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:33,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:33,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:33,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877492910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:33,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:33,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:50:33,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236779350] [2021-08-21 17:50:33,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:50:33,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:50:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:50:33,314 INFO L87 Difference]: Start difference. First operand 2209 states and 4827 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:33,444 INFO L93 Difference]: Finished difference Result 2291 states and 4967 transitions. [2021-08-21 17:50:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:50:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:50:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:33,447 INFO L225 Difference]: With dead ends: 2291 [2021-08-21 17:50:33,447 INFO L226 Difference]: Without dead ends: 2291 [2021-08-21 17:50:33,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:50:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-08-21 17:50:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2220. [2021-08-21 17:50:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.1852185669220368) internal successors, (4849), 2219 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 4849 transitions. [2021-08-21 17:50:33,477 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 4849 transitions. Word has length 21 [2021-08-21 17:50:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:33,477 INFO L470 AbstractCegarLoop]: Abstraction has 2220 states and 4849 transitions. [2021-08-21 17:50:33,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 4849 transitions. [2021-08-21 17:50:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:33,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:33,480 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:33,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2021-08-21 17:50:33,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:33,680 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:33,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:33,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1444795888, now seen corresponding path program 239 times [2021-08-21 17:50:33,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:33,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381147058] [2021-08-21 17:50:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:33,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:33,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:33,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381147058] [2021-08-21 17:50:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381147058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:33,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653929573] [2021-08-21 17:50:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:50:33,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:33,757 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 17:50:35,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:50:35,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:35,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653929573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:36,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:36,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:50:36,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142875168] [2021-08-21 17:50:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:50:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:50:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:50:36,034 INFO L87 Difference]: Start difference. First operand 2220 states and 4849 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:36,141 INFO L93 Difference]: Finished difference Result 2499 states and 5403 transitions. [2021-08-21 17:50:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:50:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:50:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:36,144 INFO L225 Difference]: With dead ends: 2499 [2021-08-21 17:50:36,144 INFO L226 Difference]: Without dead ends: 2499 [2021-08-21 17:50:36,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:50:36,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-08-21 17:50:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2441. [2021-08-21 17:50:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 2.1700819672131146) internal successors, (5295), 2440 states have internal predecessors, (5295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 5295 transitions. [2021-08-21 17:50:36,171 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 5295 transitions. Word has length 21 [2021-08-21 17:50:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:36,171 INFO L470 AbstractCegarLoop]: Abstraction has 2441 states and 5295 transitions. [2021-08-21 17:50:36,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 5295 transitions. [2021-08-21 17:50:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:36,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:36,174 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:36,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2021-08-21 17:50:36,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:36,374 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2005199956, now seen corresponding path program 240 times [2021-08-21 17:50:36,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:36,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217895805] [2021-08-21 17:50:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:36,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:50:36,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:36,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217895805] [2021-08-21 17:50:36,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217895805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:36,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932528347] [2021-08-21 17:50:36,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:50:36,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:36,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:36,456 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:36,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 17:50:38,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:50:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:38,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:38,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:50:38,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932528347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:38,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:38,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 17:50:38,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677385135] [2021-08-21 17:50:38,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:50:38,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:50:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:50:38,713 INFO L87 Difference]: Start difference. First operand 2441 states and 5295 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:38,776 INFO L93 Difference]: Finished difference Result 2520 states and 5453 transitions. [2021-08-21 17:50:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:50:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-08-21 17:50:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:38,778 INFO L225 Difference]: With dead ends: 2520 [2021-08-21 17:50:38,778 INFO L226 Difference]: Without dead ends: 2520 [2021-08-21 17:50:38,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:50:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-08-21 17:50:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2489. [2021-08-21 17:50:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.1668006430868165) internal successors, (5391), 2488 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5391 transitions. [2021-08-21 17:50:38,803 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5391 transitions. Word has length 21 [2021-08-21 17:50:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:38,803 INFO L470 AbstractCegarLoop]: Abstraction has 2489 states and 5391 transitions. [2021-08-21 17:50:38,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5391 transitions. [2021-08-21 17:50:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:38,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:38,805 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:38,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2021-08-21 17:50:39,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:39,006 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1580888720, now seen corresponding path program 241 times [2021-08-21 17:50:39,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:39,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420432040] [2021-08-21 17:50:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:39,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:39,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:39,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420432040] [2021-08-21 17:50:39,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420432040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:39,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454126720] [2021-08-21 17:50:39,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:50:39,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:39,087 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:39,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 17:50:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:41,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454126720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:41,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:41,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:50:41,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022960421] [2021-08-21 17:50:41,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:50:41,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:50:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:50:41,342 INFO L87 Difference]: Start difference. First operand 2489 states and 5391 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:41,448 INFO L93 Difference]: Finished difference Result 2543 states and 5499 transitions. [2021-08-21 17:50:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:50:41,449 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 21 [2021-08-21 17:50:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:41,451 INFO L225 Difference]: With dead ends: 2543 [2021-08-21 17:50:41,452 INFO L226 Difference]: Without dead ends: 2543 [2021-08-21 17:50:41,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:50:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-08-21 17:50:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2488. [2021-08-21 17:50:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.166867712102935) internal successors, (5389), 2487 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 5389 transitions. [2021-08-21 17:50:41,477 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 5389 transitions. Word has length 21 [2021-08-21 17:50:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:41,477 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 5389 transitions. [2021-08-21 17:50:41,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 5389 transitions. [2021-08-21 17:50:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:41,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:41,480 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:41,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:41,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 17:50:41,680 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1312142292, now seen corresponding path program 242 times [2021-08-21 17:50:41,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:41,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631263700] [2021-08-21 17:50:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:41,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:41,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:41,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631263700] [2021-08-21 17:50:41,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631263700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:41,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712998541] [2021-08-21 17:50:41,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:50:41,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:41,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:41,774 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:41,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-21 17:50:43,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:50:43,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:44,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:44,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712998541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:44,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:44,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:50:44,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618813246] [2021-08-21 17:50:44,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:50:44,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:44,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:50:44,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:50:44,073 INFO L87 Difference]: Start difference. First operand 2488 states and 5389 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:44,230 INFO L93 Difference]: Finished difference Result 2623 states and 5659 transitions. [2021-08-21 17:50:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:50:44,230 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 21 [2021-08-21 17:50:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:44,235 INFO L225 Difference]: With dead ends: 2623 [2021-08-21 17:50:44,235 INFO L226 Difference]: Without dead ends: 2623 [2021-08-21 17:50:44,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:50:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2021-08-21 17:50:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 2500. [2021-08-21 17:50:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 2.1660664265706284) internal successors, (5413), 2499 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 5413 transitions. [2021-08-21 17:50:44,263 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 5413 transitions. Word has length 21 [2021-08-21 17:50:44,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:44,263 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 5413 transitions. [2021-08-21 17:50:44,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 5413 transitions. [2021-08-21 17:50:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:50:44,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:44,266 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:44,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2021-08-21 17:50:44,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 17:50:44,466 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:44,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1570937616, now seen corresponding path program 243 times [2021-08-21 17:50:44,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:44,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712322189] [2021-08-21 17:50:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:44,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:44,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712322189] [2021-08-21 17:50:44,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712322189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231005876] [2021-08-21 17:50:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:50:44,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:44,575 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:44,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-21 17:50:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:50:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:50:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:46,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231005876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:46,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:46,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:50:46,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305764035] [2021-08-21 17:50:46,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:50:46,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:46,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:50:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:50:46,862 INFO L87 Difference]: Start difference. First operand 2500 states and 5413 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:47,028 INFO L93 Difference]: Finished difference Result 2823 states and 6059 transitions. [2021-08-21 17:50:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:50:47,029 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 21 [2021-08-21 17:50:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:47,031 INFO L225 Difference]: With dead ends: 2823 [2021-08-21 17:50:47,031 INFO L226 Difference]: Without dead ends: 2823 [2021-08-21 17:50:47,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:50:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-08-21 17:50:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2516. [2021-08-21 17:50:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 2.165009940357853) internal successors, (5445), 2515 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 5445 transitions. [2021-08-21 17:50:47,058 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 5445 transitions. Word has length 21 [2021-08-21 17:50:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:47,058 INFO L470 AbstractCegarLoop]: Abstraction has 2516 states and 5445 transitions. [2021-08-21 17:50:47,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 5445 transitions. [2021-08-21 17:50:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:50:47,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:47,060 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:47,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2021-08-21 17:50:47,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:47,260 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash 771583285, now seen corresponding path program 244 times [2021-08-21 17:50:47,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:47,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045890604] [2021-08-21 17:50:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:47,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:47,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:47,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045890604] [2021-08-21 17:50:47,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045890604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:47,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985466476] [2021-08-21 17:50:47,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:50:47,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:47,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:47,457 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:47,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-21 17:50:49,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:50:49,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:49,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:50:49,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:50,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:50:50,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:51:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:01,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985466476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:01,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:01,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 17:51:01,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537596186] [2021-08-21 17:51:01,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:51:01,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:51:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:51:01,985 INFO L87 Difference]: Start difference. First operand 2516 states and 5445 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:02,434 INFO L93 Difference]: Finished difference Result 2586 states and 5575 transitions. [2021-08-21 17:51:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:51:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-08-21 17:51:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:02,438 INFO L225 Difference]: With dead ends: 2586 [2021-08-21 17:51:02,438 INFO L226 Difference]: Without dead ends: 2567 [2021-08-21 17:51:02,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:51:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-08-21 17:51:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2537. [2021-08-21 17:51:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 2.168769716088328) internal successors, (5500), 2536 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 5500 transitions. [2021-08-21 17:51:02,466 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 5500 transitions. Word has length 22 [2021-08-21 17:51:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:02,466 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 5500 transitions. [2021-08-21 17:51:02,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 5500 transitions. [2021-08-21 17:51:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:51:02,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:02,469 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:02,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2021-08-21 17:51:02,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:02,669 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1814499023, now seen corresponding path program 245 times [2021-08-21 17:51:02,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:02,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570507061] [2021-08-21 17:51:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:02,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:02,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:02,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570507061] [2021-08-21 17:51:02,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570507061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:02,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100184448] [2021-08-21 17:51:02,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:51:02,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:02,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:02,865 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:02,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-21 17:51:05,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:51:05,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:05,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:51:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:05,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:51:05,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:51:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100184448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:31,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 17:51:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272914080] [2021-08-21 17:51:31,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:51:31,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:51:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:51:31,195 INFO L87 Difference]: Start difference. First operand 2537 states and 5500 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:31,592 INFO L93 Difference]: Finished difference Result 2610 states and 5635 transitions. [2021-08-21 17:51:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:51:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-08-21 17:51:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:31,596 INFO L225 Difference]: With dead ends: 2610 [2021-08-21 17:51:31,596 INFO L226 Difference]: Without dead ends: 2599 [2021-08-21 17:51:31,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:51:31,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-08-21 17:51:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2559. [2021-08-21 17:51:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 2.174745895230649) internal successors, (5563), 2558 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 5563 transitions. [2021-08-21 17:51:31,625 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 5563 transitions. Word has length 22 [2021-08-21 17:51:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:31,625 INFO L470 AbstractCegarLoop]: Abstraction has 2559 states and 5563 transitions. [2021-08-21 17:51:31,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 5563 transitions. [2021-08-21 17:51:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:51:31,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:31,628 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:31,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2021-08-21 17:51:31,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-08-21 17:51:31,829 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash -970057069, now seen corresponding path program 246 times [2021-08-21 17:51:31,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:31,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046560335] [2021-08-21 17:51:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:31,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:31,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:31,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046560335] [2021-08-21 17:51:31,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046560335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:31,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466791047] [2021-08-21 17:51:31,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:51:31,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:31,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:31,995 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:31,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-21 17:51:34,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:51:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:34,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:51:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:35,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:51:35,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:51:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466791047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:41,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:41,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 17:51:41,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909823288] [2021-08-21 17:51:41,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:51:41,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:51:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:51:41,051 INFO L87 Difference]: Start difference. First operand 2559 states and 5563 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:41,515 INFO L93 Difference]: Finished difference Result 2664 states and 5792 transitions. [2021-08-21 17:51:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:51:41,515 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-08-21 17:51:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:41,518 INFO L225 Difference]: With dead ends: 2664 [2021-08-21 17:51:41,518 INFO L226 Difference]: Without dead ends: 2653 [2021-08-21 17:51:41,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:51:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-08-21 17:51:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 2610. [2021-08-21 17:51:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 2.1874281333844383) internal successors, (5707), 2609 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 5707 transitions. [2021-08-21 17:51:41,547 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 5707 transitions. Word has length 22 [2021-08-21 17:51:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:41,547 INFO L470 AbstractCegarLoop]: Abstraction has 2610 states and 5707 transitions. [2021-08-21 17:51:41,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 5707 transitions. [2021-08-21 17:51:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:51:41,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:41,550 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:41,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2021-08-21 17:51:41,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:41,750 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:41,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1391950001, now seen corresponding path program 247 times [2021-08-21 17:51:41,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:41,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663237228] [2021-08-21 17:51:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:41,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:41,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:41,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663237228] [2021-08-21 17:51:41,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663237228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:41,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451572474] [2021-08-21 17:51:41,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:51:41,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:41,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:41,911 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:41,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-21 17:51:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:44,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:51:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:44,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:51:44,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:51:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:51,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451572474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:51,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:51,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 17:51:51,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206749324] [2021-08-21 17:51:51,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:51:51,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:51:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:51:51,866 INFO L87 Difference]: Start difference. First operand 2610 states and 5707 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:52,320 INFO L93 Difference]: Finished difference Result 2707 states and 5909 transitions. [2021-08-21 17:51:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:51:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-08-21 17:51:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:52,324 INFO L225 Difference]: With dead ends: 2707 [2021-08-21 17:51:52,324 INFO L226 Difference]: Without dead ends: 2696 [2021-08-21 17:51:52,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:51:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-08-21 17:51:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2652. [2021-08-21 17:51:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.1953979630328178) internal successors, (5820), 2651 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 5820 transitions. [2021-08-21 17:51:52,355 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 5820 transitions. Word has length 22 [2021-08-21 17:51:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:52,355 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 5820 transitions. [2021-08-21 17:51:52,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 5820 transitions. [2021-08-21 17:51:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:51:52,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:52,358 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:52,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:52,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:52,558 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1367092875, now seen corresponding path program 248 times [2021-08-21 17:51:52,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:52,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860024366] [2021-08-21 17:51:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:52,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:51:52,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860024366] [2021-08-21 17:51:52,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860024366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262891792] [2021-08-21 17:51:52,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:51:52,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:52,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:52,701 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:52,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2021-08-21 17:51:55,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:51:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:55,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:51:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:55,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:51:55,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:52:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262891792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:05,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:05,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-21 17:52:05,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507129511] [2021-08-21 17:52:05,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:52:05,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:05,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:52:05,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:52:05,789 INFO L87 Difference]: Start difference. First operand 2652 states and 5820 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:06,093 INFO L93 Difference]: Finished difference Result 2677 states and 5852 transitions. [2021-08-21 17:52:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:52:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 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 22 [2021-08-21 17:52:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:06,097 INFO L225 Difference]: With dead ends: 2677 [2021-08-21 17:52:06,097 INFO L226 Difference]: Without dead ends: 2665 [2021-08-21 17:52:06,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:52:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-08-21 17:52:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2652. [2021-08-21 17:52:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.1942663145982646) internal successors, (5817), 2651 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 5817 transitions. [2021-08-21 17:52:06,125 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 5817 transitions. Word has length 22 [2021-08-21 17:52:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:06,125 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 5817 transitions. [2021-08-21 17:52:06,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 5817 transitions. [2021-08-21 17:52:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:52:06,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:06,128 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:06,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2021-08-21 17:52:06,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:06,328 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:52:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1585729005, now seen corresponding path program 249 times [2021-08-21 17:52:06,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:06,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595423672] [2021-08-21 17:52:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:06,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:06,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:06,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595423672] [2021-08-21 17:52:06,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595423672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:06,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312743708] [2021-08-21 17:52:06,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:52:06,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:06,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:06,488 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:06,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2021-08-21 17:52:08,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:52:08,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:08,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 17:52:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:09,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:52:09,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 154 treesize of output 546 [2021-08-21 17:52:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:19,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312743708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:19,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:19,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 17:52:19,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159499818] [2021-08-21 17:52:19,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:52:19,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:52:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:52:19,316 INFO L87 Difference]: Start difference. First operand 2652 states and 5817 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:19,803 INFO L93 Difference]: Finished difference Result 2763 states and 6053 transitions. [2021-08-21 17:52:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:52:19,803 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-08-21 17:52:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:19,806 INFO L225 Difference]: With dead ends: 2763 [2021-08-21 17:52:19,806 INFO L226 Difference]: Without dead ends: 2751 [2021-08-21 17:52:19,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:52:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-08-21 17:52:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2707. [2021-08-21 17:52:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.2025129342202514) internal successors, (5960), 2706 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 5960 transitions. [2021-08-21 17:52:19,837 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 5960 transitions. Word has length 22 [2021-08-21 17:52:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:19,837 INFO L470 AbstractCegarLoop]: Abstraction has 2707 states and 5960 transitions. [2021-08-21 17:52:19,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 5960 transitions. [2021-08-21 17:52:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:52:19,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:19,839 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:19,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2021-08-21 17:52:20,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:20,040 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:52:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:20,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1658591733, now seen corresponding path program 250 times [2021-08-21 17:52:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:20,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929207844] [2021-08-21 17:52:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:20,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:52:20,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:20,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929207844] [2021-08-21 17:52:20,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929207844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:20,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434312789] [2021-08-21 17:52:20,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:52:20,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:20,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:20,190 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:20,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2021-08-21 17:52:22,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:52:22,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:22,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:52:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:23,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:52:23,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:52:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434312789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:35,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:35,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-21 17:52:35,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960211574] [2021-08-21 17:52:35,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:52:35,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:52:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:52:35,999 INFO L87 Difference]: Start difference. First operand 2707 states and 5960 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:36,384 INFO L93 Difference]: Finished difference Result 2731 states and 5991 transitions. [2021-08-21 17:52:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:52:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 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 22 [2021-08-21 17:52:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:36,387 INFO L225 Difference]: With dead ends: 2731 [2021-08-21 17:52:36,387 INFO L226 Difference]: Without dead ends: 2719 [2021-08-21 17:52:36,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:52:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-08-21 17:52:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2707. [2021-08-21 17:52:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.20140428677014) internal successors, (5957), 2706 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 5957 transitions. [2021-08-21 17:52:36,416 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 5957 transitions. Word has length 22 [2021-08-21 17:52:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:36,416 INFO L470 AbstractCegarLoop]: Abstraction has 2707 states and 5957 transitions. [2021-08-21 17:52:36,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 5957 transitions. [2021-08-21 17:52:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:52:36,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:36,419 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:36,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2021-08-21 17:52:36,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-08-21 17:52:36,626 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:52:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash 997056463, now seen corresponding path program 251 times [2021-08-21 17:52:36,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:36,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318125115] [2021-08-21 17:52:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:36,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:36,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:36,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318125115] [2021-08-21 17:52:36,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318125115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:36,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602164988] [2021-08-21 17:52:36,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:52:36,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:36,796 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:36,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2021-08-21 17:52:39,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:52:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:39,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:52:39,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:39,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:52:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:52:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:49,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602164988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:49,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:49,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 17:52:49,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528218428] [2021-08-21 17:52:49,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:52:49,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:52:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:52:49,059 INFO L87 Difference]: Start difference. First operand 2707 states and 5957 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:49,571 INFO L93 Difference]: Finished difference Result 2830 states and 6237 transitions. [2021-08-21 17:52:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:52:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-08-21 17:52:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:49,575 INFO L225 Difference]: With dead ends: 2830 [2021-08-21 17:52:49,575 INFO L226 Difference]: Without dead ends: 2819 [2021-08-21 17:52:49,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:52:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-08-21 17:52:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2787. [2021-08-21 17:52:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 2.2089016511127064) internal successors, (6154), 2786 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 6154 transitions. [2021-08-21 17:52:49,612 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 6154 transitions. Word has length 22 [2021-08-21 17:52:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:49,612 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 6154 transitions. [2021-08-21 17:52:49,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 6154 transitions. [2021-08-21 17:52:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:52:49,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:49,615 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:49,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:49,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 17:52:49,818 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:52:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:49,818 INFO L82 PathProgramCache]: Analyzing trace with hash 965534069, now seen corresponding path program 252 times [2021-08-21 17:52:49,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:49,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739981031] [2021-08-21 17:52:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:49,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:52:49,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:49,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739981031] [2021-08-21 17:52:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739981031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:49,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533466849] [2021-08-21 17:52:49,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:52:49,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:49,959 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:49,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2021-08-21 17:52:52,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:52:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:52,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:52:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:53,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:52:53,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:53:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:35,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533466849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:35,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:35,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-21 17:53:35,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136728959] [2021-08-21 17:53:35,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:53:35,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:35,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:53:35,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:53:35,187 INFO L87 Difference]: Start difference. First operand 2787 states and 6154 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:35,492 INFO L93 Difference]: Finished difference Result 2809 states and 6183 transitions. [2021-08-21 17:53:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:53:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 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 22 [2021-08-21 17:53:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:35,496 INFO L225 Difference]: With dead ends: 2809 [2021-08-21 17:53:35,496 INFO L226 Difference]: Without dead ends: 2797 [2021-08-21 17:53:35,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:53:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-08-21 17:53:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2787. [2021-08-21 17:53:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 2.208183776022972) internal successors, (6152), 2786 states have internal predecessors, (6152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 6152 transitions. [2021-08-21 17:53:35,526 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 6152 transitions. Word has length 22 [2021-08-21 17:53:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:35,526 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 6152 transitions. [2021-08-21 17:53:35,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 6152 transitions. [2021-08-21 17:53:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:53:35,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:35,529 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:35,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:35,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-21 17:53:35,730 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:53:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash -540972653, now seen corresponding path program 253 times [2021-08-21 17:53:35,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:35,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694394707] [2021-08-21 17:53:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:35,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:35,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:35,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694394707] [2021-08-21 17:53:35,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694394707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:35,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875937467] [2021-08-21 17:53:35,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:53:35,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:35,891 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:35,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2021-08-21 17:53:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:38,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:53:38,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:39,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:53:39,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:54:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:05,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875937467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:05,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:05,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 17:54:05,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651218753] [2021-08-21 17:54:05,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:54:05,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:54:05,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:54:05,727 INFO L87 Difference]: Start difference. First operand 2787 states and 6152 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:06,119 INFO L93 Difference]: Finished difference Result 2909 states and 6419 transitions. [2021-08-21 17:54:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:54:06,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-08-21 17:54:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:06,123 INFO L225 Difference]: With dead ends: 2909 [2021-08-21 17:54:06,123 INFO L226 Difference]: Without dead ends: 2898 [2021-08-21 17:54:06,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:54:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-08-21 17:54:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2865. [2021-08-21 17:54:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 2.2133379888268156) internal successors, (6339), 2864 states have internal predecessors, (6339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 6339 transitions. [2021-08-21 17:54:06,159 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 6339 transitions. Word has length 22 [2021-08-21 17:54:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:06,159 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 6339 transitions. [2021-08-21 17:54:06,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 6339 transitions. [2021-08-21 17:54:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:54:06,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:06,162 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:06,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:06,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:06,363 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:54:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:06,364 INFO L82 PathProgramCache]: Analyzing trace with hash 681397519, now seen corresponding path program 254 times [2021-08-21 17:54:06,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:06,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151131056] [2021-08-21 17:54:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:06,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:54:06,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:06,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151131056] [2021-08-21 17:54:06,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151131056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:06,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474192118] [2021-08-21 17:54:06,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:54:06,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:06,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:06,521 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:06,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2021-08-21 17:54:09,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:54:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:09,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:54:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:09,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:54:09,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:54:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474192118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:26,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:26,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-21 17:54:26,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072076867] [2021-08-21 17:54:26,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:54:26,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:54:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:54:26,448 INFO L87 Difference]: Start difference. First operand 2865 states and 6339 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:26,782 INFO L93 Difference]: Finished difference Result 2888 states and 6368 transitions. [2021-08-21 17:54:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:54:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 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 22 [2021-08-21 17:54:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:26,786 INFO L225 Difference]: With dead ends: 2888 [2021-08-21 17:54:26,786 INFO L226 Difference]: Without dead ends: 2874 [2021-08-21 17:54:26,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:54:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-08-21 17:54:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2865. [2021-08-21 17:54:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 2.2129888268156424) internal successors, (6338), 2864 states have internal predecessors, (6338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 6338 transitions. [2021-08-21 17:54:26,820 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 6338 transitions. Word has length 22 [2021-08-21 17:54:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:26,820 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 6338 transitions. [2021-08-21 17:54:26,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 6338 transitions. [2021-08-21 17:54:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:54:26,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:26,823 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:26,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2021-08-21 17:54:27,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:27,024 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:54:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:27,024 INFO L82 PathProgramCache]: Analyzing trace with hash -975234993, now seen corresponding path program 255 times [2021-08-21 17:54:27,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:27,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103865471] [2021-08-21 17:54:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:27,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:27,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:27,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103865471] [2021-08-21 17:54:27,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103865471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:27,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591311427] [2021-08-21 17:54:27,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:54:27,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:27,199 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:27,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2021-08-21 17:54:29,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:54:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:29,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:54:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:30,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:54:30,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 [2021-08-21 17:54:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591311427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:40,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 17:54:40,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401505469] [2021-08-21 17:54:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:54:40,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:54:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:54:40,128 INFO L87 Difference]: Start difference. First operand 2865 states and 6338 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:40,648 INFO L93 Difference]: Finished difference Result 3070 states and 6781 transitions. [2021-08-21 17:54:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:54:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-08-21 17:54:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:40,652 INFO L225 Difference]: With dead ends: 3070 [2021-08-21 17:54:40,652 INFO L226 Difference]: Without dead ends: 3058 [2021-08-21 17:54:40,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 451.2ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:54:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-08-21 17:54:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 3026. [2021-08-21 17:54:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 2.2168595041322314) internal successors, (6706), 3025 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 6706 transitions. [2021-08-21 17:54:40,686 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 6706 transitions. Word has length 22 [2021-08-21 17:54:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:40,686 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 6706 transitions. [2021-08-21 17:54:40,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 6706 transitions. [2021-08-21 17:54:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:54:40,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:40,688 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:40,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:40,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-08-21 17:54:40,889 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:54:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 114117971, now seen corresponding path program 256 times [2021-08-21 17:54:40,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:40,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674666139] [2021-08-21 17:54:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:40,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:54:41,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:41,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674666139] [2021-08-21 17:54:41,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674666139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:41,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669528818] [2021-08-21 17:54:41,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:54:41,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:41,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:41,069 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:41,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2021-08-21 17:54:43,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:54:43,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:43,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 17:54:43,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:44,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:54:44,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 119 treesize of output 511 Received shutdown request... [2021-08-21 17:54:46,285 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-21 17:54:46,288 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:54:46,299 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 17:54:46,299 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 [2021-08-21 17:54:46,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:46,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:46,488 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 11ms.. [2021-08-21 17:54:46,490 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:54:46,490 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:54:46,494 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:54:46,494 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:54:46,495 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:54:46 BasicIcfg [2021-08-21 17:54:46,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:54:46,496 INFO L168 Benchmark]: Toolchain (without parser) took 737298.34 ms. Allocated memory was 194.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 174.0 MB in the beginning and 283.3 MB in the end (delta: -109.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-21 17:54:46,496 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.47 ms. Allocated memory is still 194.0 MB. Free memory is still 175.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:54:46,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.47 ms. Allocated memory is still 194.0 MB. Free memory was 174.0 MB in the beginning and 172.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:54:46,496 INFO L168 Benchmark]: Boogie Preprocessor took 21.54 ms. Allocated memory is still 194.0 MB. Free memory was 172.4 MB in the beginning and 171.5 MB in the end (delta: 886.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:54:46,496 INFO L168 Benchmark]: RCFGBuilder took 269.04 ms. Allocated memory is still 194.0 MB. Free memory was 171.5 MB in the beginning and 154.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-08-21 17:54:46,496 INFO L168 Benchmark]: TraceAbstraction took 736974.30 ms. Allocated memory was 194.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 153.5 MB in the beginning and 283.3 MB in the end (delta: -129.8 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-21 17:54:46,497 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 0.47 ms. Allocated memory is still 194.0 MB. Free memory is still 175.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.47 ms. Allocated memory is still 194.0 MB. Free memory was 174.0 MB in the beginning and 172.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.54 ms. Allocated memory is still 194.0 MB. Free memory was 172.4 MB in the beginning and 171.5 MB in the end (delta: 886.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 269.04 ms. Allocated memory is still 194.0 MB. Free memory was 171.5 MB in the beginning and 154.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 736974.30 ms. Allocated memory was 194.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 153.5 MB in the beginning and 283.3 MB in the end (delta: -129.8 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 15, positive: 11, positive conditional: 11, 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: 11, positive: 11, positive conditional: 0, positive unconditional: 11, 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: 11, positive: 11, positive conditional: 0, positive unconditional: 11, 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: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 11, unknown conditional: 0, unknown unconditional: 11] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, 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: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 11ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 11ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 11ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 736907.6ms, OverallIterations: 261, TraceHistogramMax: 9, EmptinessCheckTime: 370.1ms, AutomataDifference: 38576.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 83.5ms, PartialOrderReductionTime: 72.3ms, HoareTripleCheckerStatistics: 4049 SDtfs, 9398 SDslu, 22219 SDs, 0 SdLazy, 50507 SolverSat, 4978 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19169.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9151 GetRequests, 4133 SyntacticMatches, 183 SemanticMatches, 4835 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22073 ImplicationChecksByTransitivity, 36503.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3729occurred in iteration=140, InterpolantAutomatonStates: 4129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4498.9ms AutomataMinimizationTime, 260 MinimizatonAttempts, 37910 StatesRemovedByMinimization, 255 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 710.9ms SsaConstructionTime, 3416.2ms SatisfiabilityAnalysisTime, 306522.8ms InterpolantComputationTime, 9799 NumberOfCodeBlocks, 9799 NumberOfCodeBlocksAsserted, 1056 NumberOfCheckSat, 9281 ConstructedInterpolants, 0 QuantifiedInterpolants, 57098 SizeOfPredicates, 206 NumberOfNonLiveVariables, 19543 ConjunctsInSsa, 4757 ConjunctsInUnsatCore, 518 InterpolantComputations, 2 PerfectInterpolantSequences, 2980/15811 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