/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/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:31:25,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:31:25,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:31:25,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:31:25,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:31:25,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:31:25,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:31:25,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:31:25,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:31:25,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:31:25,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:31:25,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:31:25,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:31:25,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:31:25,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:31:25,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:31:25,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:31:25,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:31:25,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:31:25,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:31:25,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:31:25,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:31:25,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:31:25,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:31:25,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 17:31:25,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 17:31:25,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 17:31:25,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 17:31:25,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 17:31:25,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 17:31:25,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 17:31:25,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 17:31:25,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 17:31:25,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 17:31:25,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 17:31:25,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 17:31:25,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 17:31:25,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 17:31:25,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:31:25,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:31:25,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:31:25,255 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 17:31:25,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:31:25,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:31:25,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:31:25,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:31:25,295 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:31:25,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:31:25,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:31:25,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:31:25,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:31:25,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:31:25,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:31:25,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:31:25,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:31:25,297 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:31:25,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:31:25,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:31:25,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:31:25,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:31:25,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:31:25,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:31:25,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:31:25,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:31:25,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:31:25,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:31:25,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:31:25,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:31:25,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:31:25,299 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:31:25,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:31:25,299 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:31:25,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:31:25,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:31:25,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:31:25,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:31:25,624 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:31:25,624 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:31:25,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-08-21 17:31:25,625 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-08-21 17:31:25,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:31:25,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:31:25,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:31:25,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:31:25,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:31:25,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:31:25,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:31:25,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:31:25,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:31:25,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:31:25,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:31:25,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:31:25,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:31:25,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/1) ... [2021-08-21 17:31:25,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:31:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:25,727 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 17:31:25,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 17:31:25,758 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:31:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:31:25,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:31:25,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:31:25,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:31:25,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:31:25,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:31:25,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:31:25,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:31:25,760 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 17:31:25,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:31:25,911 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 17:31:25,913 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:31:25 BoogieIcfgContainer [2021-08-21 17:31:25,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:31:25,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:31:25,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:31:25,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:31:25,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:31:25" (1/2) ... [2021-08-21 17:31:25,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0b9371 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:31:25, skipping insertion in model container [2021-08-21 17:31:25,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:31:25" (2/2) ... [2021-08-21 17:31:25,919 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-08-21 17:31:25,923 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:31:25,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:31:25,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:31:25,924 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:31:25,955 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:31:26,008 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:31:26,030 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 17:31:26,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:31:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:31:26,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:26,125 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:26,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:26,130 INFO L82 PathProgramCache]: Analyzing trace with hash 718564348, now seen corresponding path program 1 times [2021-08-21 17:31:26,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:26,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847267958] [2021-08-21 17:31:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:26,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:26,262 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 17:31:26,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:26,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847267958] [2021-08-21 17:31:26,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847267958] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:31:26,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:31:26,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:31:26,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708760092] [2021-08-21 17:31:26,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:31:26,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:26,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:31:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:31:26,281 INFO L87 Difference]: Start difference. First operand has 59 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:26,320 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-08-21 17:31:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:31:26,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 17:31:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:26,329 INFO L225 Difference]: With dead ends: 99 [2021-08-21 17:31:26,330 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 17:31:26,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:31:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 17:31:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-08-21 17:31:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2021-08-21 17:31:26,360 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 12 [2021-08-21 17:31:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:26,360 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2021-08-21 17:31:26,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2021-08-21 17:31:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:31:26,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:26,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:26,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:31:26,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:26,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1904974861, now seen corresponding path program 1 times [2021-08-21 17:31:26,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:26,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856487376] [2021-08-21 17:31:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:26,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:26,512 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 17:31:26,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:26,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856487376] [2021-08-21 17:31:26,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856487376] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:31:26,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:31:26,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:31:26,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301529084] [2021-08-21 17:31:26,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:31:26,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:31:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:31:26,520 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:26,598 INFO L93 Difference]: Finished difference Result 98 states and 135 transitions. [2021-08-21 17:31:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:31:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:31:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:26,603 INFO L225 Difference]: With dead ends: 98 [2021-08-21 17:31:26,604 INFO L226 Difference]: Without dead ends: 98 [2021-08-21 17:31:26,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:31:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-21 17:31:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2021-08-21 17:31:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.471698113207547) internal successors, (78), 53 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2021-08-21 17:31:26,622 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 15 [2021-08-21 17:31:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:26,622 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2021-08-21 17:31:26,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2021-08-21 17:31:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:31:26,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:26,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:26,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:31:26,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:26,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1262409697, now seen corresponding path program 2 times [2021-08-21 17:31:26,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:26,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852347127] [2021-08-21 17:31:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:26,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:26,685 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 17:31:26,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:26,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852347127] [2021-08-21 17:31:26,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852347127] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:31:26,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:31:26,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:31:26,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411428409] [2021-08-21 17:31:26,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:31:26,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:31:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:31:26,688 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:26,727 INFO L93 Difference]: Finished difference Result 82 states and 116 transitions. [2021-08-21 17:31:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:31:26,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:31:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:26,735 INFO L225 Difference]: With dead ends: 82 [2021-08-21 17:31:26,735 INFO L226 Difference]: Without dead ends: 80 [2021-08-21 17:31:26,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:31:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-21 17:31:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-08-21 17:31:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2021-08-21 17:31:26,741 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 15 [2021-08-21 17:31:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:26,741 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2021-08-21 17:31:26,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2021-08-21 17:31:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:31:26,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:26,742 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:26,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:31:26,742 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2339164, now seen corresponding path program 1 times [2021-08-21 17:31:26,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:26,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942013025] [2021-08-21 17:31:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:26,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:26,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:26,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942013025] [2021-08-21 17:31:26,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942013025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:26,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074917940] [2021-08-21 17:31:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:26,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:26,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:26,818 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 17:31:26,819 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 17:31:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 17:31:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:26,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074917940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:26,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:26,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 17:31:26,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018252622] [2021-08-21 17:31:26,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:31:26,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:31:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:31:26,983 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 17:31:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:27,015 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2021-08-21 17:31:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:31:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 19 [2021-08-21 17:31:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:27,016 INFO L225 Difference]: With dead ends: 104 [2021-08-21 17:31:27,017 INFO L226 Difference]: Without dead ends: 104 [2021-08-21 17:31:27,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:31:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-21 17:31:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 52. [2021-08-21 17:31:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2021-08-21 17:31:27,022 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 19 [2021-08-21 17:31:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:27,022 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2021-08-21 17:31:27,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 17:31:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2021-08-21 17:31:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:31:27,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:27,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:27,060 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 17:31:27,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:27,248 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash -383597929, now seen corresponding path program 1 times [2021-08-21 17:31:27,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:27,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881203659] [2021-08-21 17:31:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:27,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:27,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:27,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881203659] [2021-08-21 17:31:27,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881203659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:27,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510709555] [2021-08-21 17:31:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:27,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:27,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:27,473 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 17:31:27,474 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 17:31:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:31:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510709555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:27,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:27,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-21 17:31:27,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180887258] [2021-08-21 17:31:27,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:31:27,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:31:27,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:31:27,743 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 17:31:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:27,847 INFO L93 Difference]: Finished difference Result 104 states and 152 transitions. [2021-08-21 17:31:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:31:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-21 17:31:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:27,849 INFO L225 Difference]: With dead ends: 104 [2021-08-21 17:31:27,849 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 17:31:27,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:31:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 17:31:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-08-21 17:31:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 112 transitions. [2021-08-21 17:31:27,867 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 112 transitions. Word has length 19 [2021-08-21 17:31:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:27,868 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 112 transitions. [2021-08-21 17:31:27,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 17:31:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 112 transitions. [2021-08-21 17:31:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:31:27,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:27,872 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:27,891 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 17:31:28,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:28,073 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:28,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1924605847, now seen corresponding path program 2 times [2021-08-21 17:31:28,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:28,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290156803] [2021-08-21 17:31:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:28,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:28,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:28,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290156803] [2021-08-21 17:31:28,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290156803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:28,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467443647] [2021-08-21 17:31:28,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:31:28,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:28,306 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 17:31:28,308 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 17:31:28,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:31:28,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:31:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467443647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:28,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:28,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:31:28,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76281649] [2021-08-21 17:31:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:31:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:31:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:31:28,558 INFO L87 Difference]: Start difference. First operand 74 states and 112 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 17:31:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:28,806 INFO L93 Difference]: Finished difference Result 129 states and 186 transitions. [2021-08-21 17:31:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:31:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 19 [2021-08-21 17:31:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:28,807 INFO L225 Difference]: With dead ends: 129 [2021-08-21 17:31:28,807 INFO L226 Difference]: Without dead ends: 119 [2021-08-21 17:31:28,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:31:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-21 17:31:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-08-21 17:31:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.524390243902439) internal successors, (125), 82 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2021-08-21 17:31:28,812 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 19 [2021-08-21 17:31:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:28,813 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2021-08-21 17:31:28,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 17:31:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2021-08-21 17:31:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:31:28,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:28,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:28,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 17:31:29,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:29,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash 789946443, now seen corresponding path program 1 times [2021-08-21 17:31:29,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:29,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573908990] [2021-08-21 17:31:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:29,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:29,245 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 17:31:29,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:29,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573908990] [2021-08-21 17:31:29,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573908990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:29,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868999817] [2021-08-21 17:31:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:29,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:29,249 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 17:31:29,253 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 17:31:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:29,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:31:29,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:29,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868999817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:29,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:29,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 17:31:29,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85551909] [2021-08-21 17:31:29,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:31:29,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:31:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:31:29,667 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:29,909 INFO L93 Difference]: Finished difference Result 194 states and 284 transitions. [2021-08-21 17:31:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:31:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:31:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:29,911 INFO L225 Difference]: With dead ends: 194 [2021-08-21 17:31:29,911 INFO L226 Difference]: Without dead ends: 186 [2021-08-21 17:31:29,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:31:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-21 17:31:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 129. [2021-08-21 17:31:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.5859375) internal successors, (203), 128 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 203 transitions. [2021-08-21 17:31:29,942 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 203 transitions. Word has length 22 [2021-08-21 17:31:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:29,943 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 203 transitions. [2021-08-21 17:31:29,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 203 transitions. [2021-08-21 17:31:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:31:29,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:29,944 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:29,971 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 17:31:30,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:30,145 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash 180722624, now seen corresponding path program 3 times [2021-08-21 17:31:30,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:30,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108704348] [2021-08-21 17:31:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:30,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:30,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:30,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108704348] [2021-08-21 17:31:30,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108704348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:30,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965682252] [2021-08-21 17:31:30,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:31:30,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:30,229 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 17:31:30,244 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 17:31:30,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:31:30,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:31:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:30,415 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 17:31:30,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965682252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:30,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:30,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-21 17:31:30,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317803077] [2021-08-21 17:31:30,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:31:30,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:31:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:31:30,419 INFO L87 Difference]: Start difference. First operand 129 states and 203 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 17:31:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:30,525 INFO L93 Difference]: Finished difference Result 278 states and 421 transitions. [2021-08-21 17:31:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:31:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 22 [2021-08-21 17:31:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:30,527 INFO L225 Difference]: With dead ends: 278 [2021-08-21 17:31:30,527 INFO L226 Difference]: Without dead ends: 278 [2021-08-21 17:31:30,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:31:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-21 17:31:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 214. [2021-08-21 17:31:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.6291079812206573) internal successors, (347), 213 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 17:31:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 347 transitions. [2021-08-21 17:31:30,535 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 347 transitions. Word has length 22 [2021-08-21 17:31:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:30,535 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 347 transitions. [2021-08-21 17:31:30,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 17:31:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 347 transitions. [2021-08-21 17:31:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:31:30,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:30,537 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:30,562 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 17:31:30,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:30,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash 976068375, now seen corresponding path program 2 times [2021-08-21 17:31:30,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:30,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371516148] [2021-08-21 17:31:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:30,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:30,906 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 17:31:30,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:30,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371516148] [2021-08-21 17:31:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371516148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:30,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024089011] [2021-08-21 17:31:30,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:31:30,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:30,913 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 17:31:30,915 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 17:31:31,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:31:31,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:31:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:31,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024089011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:31,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:31,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 17:31:31,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025229212] [2021-08-21 17:31:31,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:31:31,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:31,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:31:31,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:31:31,311 INFO L87 Difference]: Start difference. First operand 214 states and 347 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 17:31:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:31,678 INFO L93 Difference]: Finished difference Result 398 states and 612 transitions. [2021-08-21 17:31:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:31:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 22 [2021-08-21 17:31:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:31,682 INFO L225 Difference]: With dead ends: 398 [2021-08-21 17:31:31,682 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 17:31:31,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:31:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 17:31:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-08-21 17:31:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.6632302405498283) internal successors, (484), 291 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 484 transitions. [2021-08-21 17:31:31,691 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 484 transitions. Word has length 22 [2021-08-21 17:31:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:31,691 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 484 transitions. [2021-08-21 17:31:31,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 17:31:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 484 transitions. [2021-08-21 17:31:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:31:31,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:31,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:31,722 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 17:31:31,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:31,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1429659259, now seen corresponding path program 3 times [2021-08-21 17:31:31,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:31,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548919590] [2021-08-21 17:31:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:31,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:32,112 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 17:31:32,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:32,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548919590] [2021-08-21 17:31:32,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548919590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:32,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278505645] [2021-08-21 17:31:32,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:31:32,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:32,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:32,114 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 17:31:32,115 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 17:31:32,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:31:32,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:31:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:32,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278505645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:32,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:32,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 17:31:32,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014649191] [2021-08-21 17:31:32,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:31:32,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:31:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:31:32,537 INFO L87 Difference]: Start difference. First operand 292 states and 484 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:32,921 INFO L93 Difference]: Finished difference Result 484 states and 771 transitions. [2021-08-21 17:31:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:31:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:31:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:32,923 INFO L225 Difference]: With dead ends: 484 [2021-08-21 17:31:32,923 INFO L226 Difference]: Without dead ends: 480 [2021-08-21 17:31:32,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:31:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-08-21 17:31:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 360. [2021-08-21 17:31:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.7186629526462396) internal successors, (617), 359 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 617 transitions. [2021-08-21 17:31:32,934 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 617 transitions. Word has length 22 [2021-08-21 17:31:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:32,934 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 617 transitions. [2021-08-21 17:31:32,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 617 transitions. [2021-08-21 17:31:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:31:32,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:32,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:32,964 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 17:31:33,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:33,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1869036257, now seen corresponding path program 4 times [2021-08-21 17:31:33,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:33,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159471407] [2021-08-21 17:31:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:33,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:33,374 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 17:31:33,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:33,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159471407] [2021-08-21 17:31:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159471407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:33,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908597485] [2021-08-21 17:31:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:31:33,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:33,376 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 17:31:33,401 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 17:31:33,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:31:33,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:31:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:33,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908597485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:33,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:33,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 17:31:33,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006133315] [2021-08-21 17:31:33,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:31:33,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:31:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:31:33,811 INFO L87 Difference]: Start difference. First operand 360 states and 617 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:34,091 INFO L93 Difference]: Finished difference Result 426 states and 713 transitions. [2021-08-21 17:31:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:31:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:31:34,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:34,093 INFO L225 Difference]: With dead ends: 426 [2021-08-21 17:31:34,093 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 17:31:34,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:31:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 17:31:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2021-08-21 17:31:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.733509234828496) internal successors, (657), 379 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 657 transitions. [2021-08-21 17:31:34,103 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 657 transitions. Word has length 22 [2021-08-21 17:31:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:34,104 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 657 transitions. [2021-08-21 17:31:34,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 657 transitions. [2021-08-21 17:31:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:31:34,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:34,105 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:34,135 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 17:31:34,318 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,SelfDestructingSolverStorable10 [2021-08-21 17:31:34,318 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash 152116873, now seen corresponding path program 5 times [2021-08-21 17:31:34,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:34,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920715780] [2021-08-21 17:31:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:34,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:34,497 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 17:31:34,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:34,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920715780] [2021-08-21 17:31:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920715780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:34,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61410300] [2021-08-21 17:31:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:31:34,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:34,509 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 17:31:34,510 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 17:31:34,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:31:34,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:34,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:31:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:34,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61410300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:34,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:34,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 17:31:34,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961247599] [2021-08-21 17:31:34,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:31:34,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:31:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:31:34,985 INFO L87 Difference]: Start difference. First operand 380 states and 657 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:35,313 INFO L93 Difference]: Finished difference Result 449 states and 758 transitions. [2021-08-21 17:31:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:31:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:31:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:35,316 INFO L225 Difference]: With dead ends: 449 [2021-08-21 17:31:35,316 INFO L226 Difference]: Without dead ends: 445 [2021-08-21 17:31:35,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:31:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-08-21 17:31:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 406. [2021-08-21 17:31:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.7407407407407407) internal successors, (705), 405 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 705 transitions. [2021-08-21 17:31:35,327 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 705 transitions. Word has length 22 [2021-08-21 17:31:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:35,328 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 705 transitions. [2021-08-21 17:31:35,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 705 transitions. [2021-08-21 17:31:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:35,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:35,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:35,353 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 17:31:35,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:35,549 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash 816543255, now seen corresponding path program 6 times [2021-08-21 17:31:35,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:35,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224589094] [2021-08-21 17:31:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:35,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:35,763 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 17:31:35,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:35,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224589094] [2021-08-21 17:31:35,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224589094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:35,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719243352] [2021-08-21 17:31:35,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:31:35,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:35,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:35,764 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 17:31:35,765 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 17:31:35,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:31:35,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:35,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:36,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719243352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:36,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:36,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:31:36,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540807074] [2021-08-21 17:31:36,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:31:36,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:31:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:31:36,355 INFO L87 Difference]: Start difference. First operand 406 states and 705 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:37,019 INFO L93 Difference]: Finished difference Result 691 states and 1139 transitions. [2021-08-21 17:31:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:31:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:37,023 INFO L225 Difference]: With dead ends: 691 [2021-08-21 17:31:37,023 INFO L226 Difference]: Without dead ends: 683 [2021-08-21 17:31:37,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:31:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-21 17:31:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 502. [2021-08-21 17:31:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.780439121756487) internal successors, (892), 501 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 892 transitions. [2021-08-21 17:31:37,039 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 892 transitions. Word has length 25 [2021-08-21 17:31:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:37,039 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 892 transitions. [2021-08-21 17:31:37,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 892 transitions. [2021-08-21 17:31:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:37,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:37,041 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:37,068 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 17:31:37,260 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,SelfDestructingSolverStorable12 [2021-08-21 17:31:37,261 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:37,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1369794236, now seen corresponding path program 7 times [2021-08-21 17:31:37,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:37,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134630817] [2021-08-21 17:31:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:37,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:37,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:37,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134630817] [2021-08-21 17:31:37,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134630817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:37,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478187809] [2021-08-21 17:31:37,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:31:37,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:37,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:37,295 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 17:31:37,296 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 17:31:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:37,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:31:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:37,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478187809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:37,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:37,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 17:31:37,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117742787] [2021-08-21 17:31:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:31:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:31:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:31:37,593 INFO L87 Difference]: Start difference. First operand 502 states and 892 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 17:31:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:37,654 INFO L93 Difference]: Finished difference Result 852 states and 1476 transitions. [2021-08-21 17:31:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:31:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-08-21 17:31:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:37,657 INFO L225 Difference]: With dead ends: 852 [2021-08-21 17:31:37,658 INFO L226 Difference]: Without dead ends: 852 [2021-08-21 17:31:37,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:31:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-21 17:31:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 746. [2021-08-21 17:31:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.8214765100671142) internal successors, (1357), 745 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1357 transitions. [2021-08-21 17:31:37,677 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1357 transitions. Word has length 25 [2021-08-21 17:31:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:37,678 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1357 transitions. [2021-08-21 17:31:37,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 17:31:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1357 transitions. [2021-08-21 17:31:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:37,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:37,679 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:37,702 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 17:31:37,893 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,SelfDestructingSolverStorable13 [2021-08-21 17:31:37,893 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash -727229072, now seen corresponding path program 8 times [2021-08-21 17:31:37,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:37,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062970889] [2021-08-21 17:31:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:37,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:37,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:37,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062970889] [2021-08-21 17:31:37,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062970889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:37,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859315866] [2021-08-21 17:31:37,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:31:37,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:37,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:37,946 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 17:31:37,947 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 17:31:38,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:31:38,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:38,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:31:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:31:38,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859315866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:38,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:38,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 17:31:38,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510309941] [2021-08-21 17:31:38,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:31:38,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:31:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:31:38,239 INFO L87 Difference]: Start difference. First operand 746 states and 1357 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 17:31:38,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:38,282 INFO L93 Difference]: Finished difference Result 847 states and 1468 transitions. [2021-08-21 17:31:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:31:38,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-08-21 17:31:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:38,285 INFO L225 Difference]: With dead ends: 847 [2021-08-21 17:31:38,285 INFO L226 Difference]: Without dead ends: 845 [2021-08-21 17:31:38,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:31:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-08-21 17:31:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 748. [2021-08-21 17:31:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.8152610441767068) internal successors, (1356), 747 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1356 transitions. [2021-08-21 17:31:38,303 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1356 transitions. Word has length 25 [2021-08-21 17:31:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:38,304 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1356 transitions. [2021-08-21 17:31:38,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 17:31:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1356 transitions. [2021-08-21 17:31:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:38,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:38,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:38,333 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 17:31:38,530 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,SelfDestructingSolverStorable14 [2021-08-21 17:31:38,531 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:38,531 INFO L82 PathProgramCache]: Analyzing trace with hash -737666620, now seen corresponding path program 9 times [2021-08-21 17:31:38,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:38,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851035456] [2021-08-21 17:31:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:38,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:38,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:38,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851035456] [2021-08-21 17:31:38,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851035456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:38,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512006217] [2021-08-21 17:31:38,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:31:38,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:38,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:38,568 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 17:31:38,568 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 17:31:38,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:31:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:31:38,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:38,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512006217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:38,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:38,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:31:38,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672073069] [2021-08-21 17:31:38,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:31:38,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:31:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:31:38,875 INFO L87 Difference]: Start difference. First operand 748 states and 1356 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 17:31:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:38,935 INFO L93 Difference]: Finished difference Result 841 states and 1456 transitions. [2021-08-21 17:31:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:31:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 25 [2021-08-21 17:31:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:38,938 INFO L225 Difference]: With dead ends: 841 [2021-08-21 17:31:38,939 INFO L226 Difference]: Without dead ends: 833 [2021-08-21 17:31:38,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:31:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-08-21 17:31:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 756. [2021-08-21 17:31:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 1.8079470198675496) internal successors, (1365), 755 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1365 transitions. [2021-08-21 17:31:38,957 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1365 transitions. Word has length 25 [2021-08-21 17:31:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:38,957 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1365 transitions. [2021-08-21 17:31:38,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 17:31:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1365 transitions. [2021-08-21 17:31:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:38,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:38,959 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:38,985 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 17:31:39,169 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,SelfDestructingSolverStorable15 [2021-08-21 17:31:39,169 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash -313919593, now seen corresponding path program 10 times [2021-08-21 17:31:39,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:39,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572026883] [2021-08-21 17:31:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:39,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:39,370 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 17:31:39,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:39,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572026883] [2021-08-21 17:31:39,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572026883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:39,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344480736] [2021-08-21 17:31:39,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:31:39,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:39,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:39,372 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 17:31:39,372 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 17:31:39,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:31:39,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344480736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:39,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:39,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 17:31:39,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103605965] [2021-08-21 17:31:39,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:31:39,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:39,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:31:39,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:31:39,928 INFO L87 Difference]: Start difference. First operand 756 states and 1365 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:40,533 INFO L93 Difference]: Finished difference Result 1236 states and 2123 transitions. [2021-08-21 17:31:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:31:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:40,538 INFO L225 Difference]: With dead ends: 1236 [2021-08-21 17:31:40,538 INFO L226 Difference]: Without dead ends: 1224 [2021-08-21 17:31:40,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:31:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-08-21 17:31:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 868. [2021-08-21 17:31:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.8350634371395618) internal successors, (1591), 867 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1591 transitions. [2021-08-21 17:31:40,563 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1591 transitions. Word has length 25 [2021-08-21 17:31:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:40,563 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1591 transitions. [2021-08-21 17:31:40,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1591 transitions. [2021-08-21 17:31:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:40,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:40,565 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:40,589 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 17:31:40,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:40,789 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:40,790 INFO L82 PathProgramCache]: Analyzing trace with hash -771531996, now seen corresponding path program 11 times [2021-08-21 17:31:40,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:40,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329903612] [2021-08-21 17:31:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:40,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:40,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:40,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329903612] [2021-08-21 17:31:40,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329903612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:40,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673471840] [2021-08-21 17:31:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:31:40,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:40,843 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 17:31:40,845 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 17:31:41,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:31:41,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:31:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:41,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673471840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:41,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:41,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-08-21 17:31:41,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524447643] [2021-08-21 17:31:41,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:31:41,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:31:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:31:41,237 INFO L87 Difference]: Start difference. First operand 868 states and 1591 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:41,281 INFO L93 Difference]: Finished difference Result 896 states and 1617 transitions. [2021-08-21 17:31:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:31:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:41,285 INFO L225 Difference]: With dead ends: 896 [2021-08-21 17:31:41,285 INFO L226 Difference]: Without dead ends: 894 [2021-08-21 17:31:41,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:31:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-08-21 17:31:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 868. [2021-08-21 17:31:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.8246828143021914) internal successors, (1582), 867 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1582 transitions. [2021-08-21 17:31:41,305 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1582 transitions. Word has length 25 [2021-08-21 17:31:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:41,306 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1582 transitions. [2021-08-21 17:31:41,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1582 transitions. [2021-08-21 17:31:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:41,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:41,308 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:41,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 17:31:41,522 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,SelfDestructingSolverStorable17 [2021-08-21 17:31:41,523 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash 169903891, now seen corresponding path program 12 times [2021-08-21 17:31:41,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:41,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834971921] [2021-08-21 17:31:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:41,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:41,734 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 17:31:41,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:41,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834971921] [2021-08-21 17:31:41,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834971921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:41,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909885361] [2021-08-21 17:31:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:31:41,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:41,736 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 17:31:41,736 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 17:31:42,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:31:42,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:42,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:42,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:42,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909885361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:42,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:42,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:31:42,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863916375] [2021-08-21 17:31:42,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:31:42,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:31:42,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:31:42,395 INFO L87 Difference]: Start difference. First operand 868 states and 1582 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:43,150 INFO L93 Difference]: Finished difference Result 1343 states and 2352 transitions. [2021-08-21 17:31:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:31:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:43,154 INFO L225 Difference]: With dead ends: 1343 [2021-08-21 17:31:43,154 INFO L226 Difference]: Without dead ends: 1327 [2021-08-21 17:31:43,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:31:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-08-21 17:31:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1055. [2021-08-21 17:31:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 1.8690702087286528) internal successors, (1970), 1054 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1970 transitions. [2021-08-21 17:31:43,181 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1970 transitions. Word has length 25 [2021-08-21 17:31:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1970 transitions. [2021-08-21 17:31:43,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1970 transitions. [2021-08-21 17:31:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:43,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:43,183 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:43,210 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 17:31:43,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:43,397 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 773404265, now seen corresponding path program 13 times [2021-08-21 17:31:43,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:43,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348238924] [2021-08-21 17:31:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:43,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:43,602 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 17:31:43,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:43,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348238924] [2021-08-21 17:31:43,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348238924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:43,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725683113] [2021-08-21 17:31:43,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:31:43,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:43,609 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 17:31:43,610 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 17:31:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:43,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:44,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725683113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:44,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:44,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:31:44,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280398853] [2021-08-21 17:31:44,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:31:44,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:31:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:31:44,222 INFO L87 Difference]: Start difference. First operand 1055 states and 1970 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:44,858 INFO L93 Difference]: Finished difference Result 1355 states and 2412 transitions. [2021-08-21 17:31:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:31:44,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:44,863 INFO L225 Difference]: With dead ends: 1355 [2021-08-21 17:31:44,864 INFO L226 Difference]: Without dead ends: 1339 [2021-08-21 17:31:44,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:31:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-08-21 17:31:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1118. [2021-08-21 17:31:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 1.88272157564906) internal successors, (2103), 1117 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 2103 transitions. [2021-08-21 17:31:44,892 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 2103 transitions. Word has length 25 [2021-08-21 17:31:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:44,893 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 2103 transitions. [2021-08-21 17:31:44,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 2103 transitions. [2021-08-21 17:31:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:44,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:44,895 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:44,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 17:31:45,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:45,109 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1394652883, now seen corresponding path program 14 times [2021-08-21 17:31:45,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:45,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910776554] [2021-08-21 17:31:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:45,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:45,317 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 17:31:45,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:45,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910776554] [2021-08-21 17:31:45,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910776554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:45,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316826766] [2021-08-21 17:31:45,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:31:45,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:45,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:45,318 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 17:31:45,319 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 17:31:45,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:31:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:45,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316826766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:45,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:45,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:31:46,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693015133] [2021-08-21 17:31:46,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:31:46,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:46,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:31:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:31:46,001 INFO L87 Difference]: Start difference. First operand 1118 states and 2103 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:46,619 INFO L93 Difference]: Finished difference Result 1538 states and 2754 transitions. [2021-08-21 17:31:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:31:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:46,625 INFO L225 Difference]: With dead ends: 1538 [2021-08-21 17:31:46,626 INFO L226 Difference]: Without dead ends: 1522 [2021-08-21 17:31:46,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:31:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-08-21 17:31:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1281. [2021-08-21 17:31:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 1.89921875) internal successors, (2431), 1280 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 2431 transitions. [2021-08-21 17:31:46,656 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 2431 transitions. Word has length 25 [2021-08-21 17:31:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:46,656 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 2431 transitions. [2021-08-21 17:31:46,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 2431 transitions. [2021-08-21 17:31:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:46,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:46,658 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:46,686 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 17:31:46,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:46,873 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash 955275885, now seen corresponding path program 15 times [2021-08-21 17:31:46,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:46,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170849228] [2021-08-21 17:31:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:46,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:47,091 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 17:31:47,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:47,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170849228] [2021-08-21 17:31:47,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170849228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:47,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365161253] [2021-08-21 17:31:47,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:31:47,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:47,097 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 17:31:47,103 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 17:31:47,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:31:47,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:47,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365161253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:47,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:47,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:31:47,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97925611] [2021-08-21 17:31:47,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:31:47,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:31:47,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:31:47,756 INFO L87 Difference]: Start difference. First operand 1281 states and 2431 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:48,305 INFO L93 Difference]: Finished difference Result 1492 states and 2739 transitions. [2021-08-21 17:31:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:31:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:48,311 INFO L225 Difference]: With dead ends: 1492 [2021-08-21 17:31:48,311 INFO L226 Difference]: Without dead ends: 1476 [2021-08-21 17:31:48,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:31:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-08-21 17:31:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1343. [2021-08-21 17:31:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.9061102831594634) internal successors, (2558), 1342 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2558 transitions. [2021-08-21 17:31:48,341 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2558 transitions. Word has length 25 [2021-08-21 17:31:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:48,341 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 2558 transitions. [2021-08-21 17:31:48,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2558 transitions. [2021-08-21 17:31:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:48,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:48,343 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:48,372 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 17:31:48,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:48,557 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:48,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1318538281, now seen corresponding path program 16 times [2021-08-21 17:31:48,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:48,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609178500] [2021-08-21 17:31:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:48,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:48,771 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 17:31:48,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:48,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609178500] [2021-08-21 17:31:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609178500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:48,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206946781] [2021-08-21 17:31:48,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:31:48,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:48,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:48,777 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 17:31:48,799 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 17:31:49,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:31:49,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:49,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:49,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:49,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206946781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:49,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:49,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:31:49,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043549922] [2021-08-21 17:31:49,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:31:49,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:31:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:31:49,445 INFO L87 Difference]: Start difference. First operand 1343 states and 2558 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:49,892 INFO L93 Difference]: Finished difference Result 1512 states and 2803 transitions. [2021-08-21 17:31:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:31:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:49,897 INFO L225 Difference]: With dead ends: 1512 [2021-08-21 17:31:49,898 INFO L226 Difference]: Without dead ends: 1506 [2021-08-21 17:31:49,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:31:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-08-21 17:31:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1387. [2021-08-21 17:31:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 1.9105339105339105) internal successors, (2648), 1386 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2648 transitions. [2021-08-21 17:31:49,926 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2648 transitions. Word has length 25 [2021-08-21 17:31:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:49,927 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 2648 transitions. [2021-08-21 17:31:49,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2648 transitions. [2021-08-21 17:31:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:31:49,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:49,929 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:49,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 17:31:50,142 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,SelfDestructingSolverStorable22 [2021-08-21 17:31:50,143 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1941392241, now seen corresponding path program 17 times [2021-08-21 17:31:50,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:50,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149161722] [2021-08-21 17:31:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:50,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:50,363 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 17:31:50,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:50,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149161722] [2021-08-21 17:31:50,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149161722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:50,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974115695] [2021-08-21 17:31:50,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:31:50,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:50,369 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 17:31:50,371 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 17:31:50,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:31:50,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:50,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:31:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:51,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974115695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:51,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:51,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:31:51,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040605927] [2021-08-21 17:31:51,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:31:51,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:31:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:31:51,137 INFO L87 Difference]: Start difference. First operand 1387 states and 2648 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:51,659 INFO L93 Difference]: Finished difference Result 1628 states and 3015 transitions. [2021-08-21 17:31:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:31:51,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:31:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:51,665 INFO L225 Difference]: With dead ends: 1628 [2021-08-21 17:31:51,665 INFO L226 Difference]: Without dead ends: 1612 [2021-08-21 17:31:51,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:31:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-08-21 17:31:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1450. [2021-08-21 17:31:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 1.9178743961352658) internal successors, (2779), 1449 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2779 transitions. [2021-08-21 17:31:51,694 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2779 transitions. Word has length 25 [2021-08-21 17:31:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:51,694 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 2779 transitions. [2021-08-21 17:31:51,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2779 transitions. [2021-08-21 17:31:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:31:51,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:51,697 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:51,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 17:31:51,921 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,SelfDestructingSolverStorable23 [2021-08-21 17:31:51,921 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1509015049, now seen corresponding path program 18 times [2021-08-21 17:31:51,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:51,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880368329] [2021-08-21 17:31:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:51,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:51,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:51,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880368329] [2021-08-21 17:31:51,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880368329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:51,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995426241] [2021-08-21 17:31:51,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:31:51,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:51,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:51,993 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 17:31:51,994 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 17:31:52,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:31:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:31:52,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:52,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995426241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:52,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:52,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-21 17:31:52,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789815506] [2021-08-21 17:31:52,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:31:52,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:31:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:31:52,535 INFO L87 Difference]: Start difference. First operand 1450 states and 2779 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:52,608 INFO L93 Difference]: Finished difference Result 1479 states and 2590 transitions. [2021-08-21 17:31:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:31:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:31:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:52,613 INFO L225 Difference]: With dead ends: 1479 [2021-08-21 17:31:52,613 INFO L226 Difference]: Without dead ends: 1362 [2021-08-21 17:31:52,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:31:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-08-21 17:31:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 911. [2021-08-21 17:31:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 1.80989010989011) internal successors, (1647), 910 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1647 transitions. [2021-08-21 17:31:52,632 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1647 transitions. Word has length 26 [2021-08-21 17:31:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:52,633 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1647 transitions. [2021-08-21 17:31:52,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1647 transitions. [2021-08-21 17:31:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:31:52,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:52,634 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:52,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 17:31:52,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:52,859 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:52,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1893576932, now seen corresponding path program 4 times [2021-08-21 17:31:52,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:52,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934056518] [2021-08-21 17:31:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:52,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:31:53,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:53,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934056518] [2021-08-21 17:31:53,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934056518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:53,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462880719] [2021-08-21 17:31:53,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:31:53,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:53,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:53,011 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 17:31:53,012 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 17:31:53,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:31:53,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:31:53,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:31:53,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462880719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:53,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:53,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:31:53,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833201681] [2021-08-21 17:31:53,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:31:53,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:53,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:31:53,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:31:53,673 INFO L87 Difference]: Start difference. First operand 911 states and 1647 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 17:31:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:53,868 INFO L93 Difference]: Finished difference Result 982 states and 1745 transitions. [2021-08-21 17:31:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:31:53,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:31:53,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:53,871 INFO L225 Difference]: With dead ends: 982 [2021-08-21 17:31:53,871 INFO L226 Difference]: Without dead ends: 929 [2021-08-21 17:31:53,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:31:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-21 17:31:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 921. [2021-08-21 17:31:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.8054347826086956) internal successors, (1661), 920 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:53,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1661 transitions. [2021-08-21 17:31:53,883 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1661 transitions. Word has length 26 [2021-08-21 17:31:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:53,884 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1661 transitions. [2021-08-21 17:31:53,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 17:31:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1661 transitions. [2021-08-21 17:31:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:31:53,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:53,885 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:53,914 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 17:31:54,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:54,110 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1447097947, now seen corresponding path program 19 times [2021-08-21 17:31:54,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:54,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124839838] [2021-08-21 17:31:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:54,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:54,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:54,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124839838] [2021-08-21 17:31:54,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124839838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:54,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074195502] [2021-08-21 17:31:54,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:31:54,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:54,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:54,353 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 17:31:54,353 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 17:31:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:31:54,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:55,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074195502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:55,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:55,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 17:31:55,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274889928] [2021-08-21 17:31:55,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:31:55,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:55,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:31:55,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:31:55,202 INFO L87 Difference]: Start difference. First operand 921 states and 1661 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:56,032 INFO L93 Difference]: Finished difference Result 1145 states and 1978 transitions. [2021-08-21 17:31:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:31:56,033 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 17:31:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:56,037 INFO L225 Difference]: With dead ends: 1145 [2021-08-21 17:31:56,037 INFO L226 Difference]: Without dead ends: 1129 [2021-08-21 17:31:56,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 578.6ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:31:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-08-21 17:31:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 960. [2021-08-21 17:31:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.8175182481751824) internal successors, (1743), 959 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1743 transitions. [2021-08-21 17:31:56,054 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1743 transitions. Word has length 28 [2021-08-21 17:31:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:56,055 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1743 transitions. [2021-08-21 17:31:56,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1743 transitions. [2021-08-21 17:31:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:31:56,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:56,057 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:56,085 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 17:31:56,272 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,SelfDestructingSolverStorable26 [2021-08-21 17:31:56,273 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:56,273 INFO L82 PathProgramCache]: Analyzing trace with hash -644844599, now seen corresponding path program 20 times [2021-08-21 17:31:56,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:56,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742109431] [2021-08-21 17:31:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:56,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:56,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:56,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742109431] [2021-08-21 17:31:56,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742109431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:56,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946988109] [2021-08-21 17:31:56,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:31:56,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:56,513 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 17:31:56,513 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 17:31:56,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:31:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:56,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:31:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:57,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946988109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:57,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:57,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 17:31:57,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107554298] [2021-08-21 17:31:57,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:31:57,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:57,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:31:57,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:31:57,391 INFO L87 Difference]: Start difference. First operand 960 states and 1743 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:31:58,138 INFO L93 Difference]: Finished difference Result 1129 states and 1987 transitions. [2021-08-21 17:31:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:31:58,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 17:31:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:31:58,142 INFO L225 Difference]: With dead ends: 1129 [2021-08-21 17:31:58,143 INFO L226 Difference]: Without dead ends: 1113 [2021-08-21 17:31:58,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:31:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-21 17:31:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 998. [2021-08-21 17:31:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 1.8254764292878636) internal successors, (1820), 997 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1820 transitions. [2021-08-21 17:31:58,156 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1820 transitions. Word has length 28 [2021-08-21 17:31:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:31:58,156 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1820 transitions. [2021-08-21 17:31:58,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:31:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1820 transitions. [2021-08-21 17:31:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:31:58,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:31:58,158 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:31:58,190 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 17:31:58,380 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,SelfDestructingSolverStorable27 [2021-08-21 17:31:58,381 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:31:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:31:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1267698559, now seen corresponding path program 21 times [2021-08-21 17:31:58,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:31:58,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064402877] [2021-08-21 17:31:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:31:58,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:31:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:31:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:31:58,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:31:58,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064402877] [2021-08-21 17:31:58,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064402877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:58,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056838871] [2021-08-21 17:31:58,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:31:58,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:31:58,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:31:58,617 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 17:31:58,617 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 17:31:59,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:31:59,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:31:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:31:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:31:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:31:59,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056838871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:31:59,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:31:59,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 17:31:59,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455434853] [2021-08-21 17:31:59,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:31:59,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:31:59,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:31:59,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:31:59,474 INFO L87 Difference]: Start difference. First operand 998 states and 1820 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:00,282 INFO L93 Difference]: Finished difference Result 1207 states and 2136 transitions. [2021-08-21 17:32:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:32:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 17:32:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:00,299 INFO L225 Difference]: With dead ends: 1207 [2021-08-21 17:32:00,299 INFO L226 Difference]: Without dead ends: 1191 [2021-08-21 17:32:00,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 620.3ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:32:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-08-21 17:32:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1060. [2021-08-21 17:32:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 1.838526912181303) internal successors, (1947), 1059 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1947 transitions. [2021-08-21 17:32:00,316 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1947 transitions. Word has length 28 [2021-08-21 17:32:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:00,316 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1947 transitions. [2021-08-21 17:32:00,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1947 transitions. [2021-08-21 17:32:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:32:00,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:00,318 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:00,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:00,544 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,SelfDestructingSolverStorable28 [2021-08-21 17:32:00,544 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1128288499, now seen corresponding path program 22 times [2021-08-21 17:32:00,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:00,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542760871] [2021-08-21 17:32:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:00,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:00,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:00,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542760871] [2021-08-21 17:32:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542760871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:00,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849527631] [2021-08-21 17:32:00,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:00,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:00,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:00,588 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 17:32:00,589 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 17:32:01,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:32:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:01,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849527631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:01,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:01,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:32:01,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740287025] [2021-08-21 17:32:01,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:32:01,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:32:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:01,296 INFO L87 Difference]: Start difference. First operand 1060 states and 1947 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 17:32:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:01,354 INFO L93 Difference]: Finished difference Result 1295 states and 2290 transitions. [2021-08-21 17:32:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:32:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 29 [2021-08-21 17:32:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:01,358 INFO L225 Difference]: With dead ends: 1295 [2021-08-21 17:32:01,359 INFO L226 Difference]: Without dead ends: 1293 [2021-08-21 17:32:01,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-08-21 17:32:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1132. [2021-08-21 17:32:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.8178603006189213) internal successors, (2056), 1131 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 2056 transitions. [2021-08-21 17:32:01,374 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 2056 transitions. Word has length 29 [2021-08-21 17:32:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:01,374 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 2056 transitions. [2021-08-21 17:32:01,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 17:32:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 2056 transitions. [2021-08-21 17:32:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:32:01,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:01,375 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:01,393 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 17:32:01,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:01,576 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash 519064680, now seen corresponding path program 23 times [2021-08-21 17:32:01,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:01,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072650654] [2021-08-21 17:32:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:01,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:32:01,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:01,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072650654] [2021-08-21 17:32:01,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072650654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:01,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40395732] [2021-08-21 17:32:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:01,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:01,638 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 17:32:01,640 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 17:32:02,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:32:02,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:32:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:32:02,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40395732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:02,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:02,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-21 17:32:02,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516410128] [2021-08-21 17:32:02,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:32:02,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:32:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:02,261 INFO L87 Difference]: Start difference. First operand 1132 states and 2056 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:02,338 INFO L93 Difference]: Finished difference Result 1113 states and 1953 transitions. [2021-08-21 17:32:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:32:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 17:32:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:02,341 INFO L225 Difference]: With dead ends: 1113 [2021-08-21 17:32:02,341 INFO L226 Difference]: Without dead ends: 1113 [2021-08-21 17:32:02,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:32:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-21 17:32:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 901. [2021-08-21 17:32:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.7833333333333334) internal successors, (1605), 900 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1605 transitions. [2021-08-21 17:32:02,354 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1605 transitions. Word has length 29 [2021-08-21 17:32:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:02,354 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1605 transitions. [2021-08-21 17:32:02,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1605 transitions. [2021-08-21 17:32:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:32:02,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:02,355 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:02,373 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 17:32:02,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:02,557 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash -126554981, now seen corresponding path program 5 times [2021-08-21 17:32:02,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:02,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849279644] [2021-08-21 17:32:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:02,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:02,621 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 17:32:02,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:02,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849279644] [2021-08-21 17:32:02,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849279644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:02,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079588315] [2021-08-21 17:32:02,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:02,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:02,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:02,622 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 17:32:02,623 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 17:32:03,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:32:03,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:32:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:03,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079588315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:03,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:03,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-21 17:32:03,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092089819] [2021-08-21 17:32:03,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:32:03,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:32:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:03,263 INFO L87 Difference]: Start difference. First operand 901 states and 1605 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:03,368 INFO L93 Difference]: Finished difference Result 1135 states and 1938 transitions. [2021-08-21 17:32:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:32:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 17:32:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:03,370 INFO L225 Difference]: With dead ends: 1135 [2021-08-21 17:32:03,371 INFO L226 Difference]: Without dead ends: 1135 [2021-08-21 17:32:03,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:32:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-08-21 17:32:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 938. [2021-08-21 17:32:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.75880469583778) internal successors, (1648), 937 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1648 transitions. [2021-08-21 17:32:03,380 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1648 transitions. Word has length 29 [2021-08-21 17:32:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:03,381 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1648 transitions. [2021-08-21 17:32:03,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1648 transitions. [2021-08-21 17:32:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:32:03,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:03,382 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:03,400 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 17:32:03,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:03,585 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:03,585 INFO L82 PathProgramCache]: Analyzing trace with hash 492196723, now seen corresponding path program 24 times [2021-08-21 17:32:03,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:03,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290924148] [2021-08-21 17:32:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:03,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:03,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:03,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290924148] [2021-08-21 17:32:03,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290924148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:03,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508439630] [2021-08-21 17:32:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:03,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:03,637 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 17:32:03,669 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 17:32:04,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:32:04,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:04,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:32:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:04,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508439630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:04,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:04,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-08-21 17:32:04,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556512783] [2021-08-21 17:32:04,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:32:04,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:32:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:04,324 INFO L87 Difference]: Start difference. First operand 938 states and 1648 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:04,388 INFO L93 Difference]: Finished difference Result 1170 states and 1965 transitions. [2021-08-21 17:32:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:32:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 17:32:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:04,390 INFO L225 Difference]: With dead ends: 1170 [2021-08-21 17:32:04,390 INFO L226 Difference]: Without dead ends: 1170 [2021-08-21 17:32:04,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-08-21 17:32:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1004. [2021-08-21 17:32:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.7627118644067796) internal successors, (1768), 1003 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1768 transitions. [2021-08-21 17:32:04,403 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1768 transitions. Word has length 29 [2021-08-21 17:32:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:04,403 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1768 transitions. [2021-08-21 17:32:04,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1768 transitions. [2021-08-21 17:32:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:32:04,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:04,405 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:04,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 17:32:04,608 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,SelfDestructingSolverStorable32 [2021-08-21 17:32:04,608 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:04,608 INFO L82 PathProgramCache]: Analyzing trace with hash 549423511, now seen corresponding path program 25 times [2021-08-21 17:32:04,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:04,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249700636] [2021-08-21 17:32:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:04,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:04,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:04,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249700636] [2021-08-21 17:32:04,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249700636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:04,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285834067] [2021-08-21 17:32:04,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:04,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:04,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:04,850 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 17:32:04,851 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 17:32:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:05,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:32:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:05,907 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 17:32:05,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285834067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:05,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:05,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:32:05,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570863394] [2021-08-21 17:32:05,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:32:05,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:32:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:32:05,909 INFO L87 Difference]: Start difference. First operand 1004 states and 1768 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:06,997 INFO L93 Difference]: Finished difference Result 1471 states and 2503 transitions. [2021-08-21 17:32:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:32:06,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:32:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:07,000 INFO L225 Difference]: With dead ends: 1471 [2021-08-21 17:32:07,000 INFO L226 Difference]: Without dead ends: 1455 [2021-08-21 17:32:07,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 975.6ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:32:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-21 17:32:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1139. [2021-08-21 17:32:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.7961335676625658) internal successors, (2044), 1138 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 2044 transitions. [2021-08-21 17:32:07,015 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 2044 transitions. Word has length 31 [2021-08-21 17:32:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:07,015 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 2044 transitions. [2021-08-21 17:32:07,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 2044 transitions. [2021-08-21 17:32:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:32:07,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:07,016 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:07,036 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 17:32:07,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:07,222 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1031747689, now seen corresponding path program 26 times [2021-08-21 17:32:07,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:07,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699234106] [2021-08-21 17:32:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:07,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:07,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:07,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699234106] [2021-08-21 17:32:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699234106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:07,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397150169] [2021-08-21 17:32:07,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:07,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:07,401 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 17:32:07,423 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 17:32:08,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:32:08,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:08,434 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 17:32:08,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397150169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:08,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:08,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 17:32:08,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172611737] [2021-08-21 17:32:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:32:08,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:32:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:32:08,435 INFO L87 Difference]: Start difference. First operand 1139 states and 2044 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:09,302 INFO L93 Difference]: Finished difference Result 1391 states and 2423 transitions. [2021-08-21 17:32:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:32:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:32:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:09,304 INFO L225 Difference]: With dead ends: 1391 [2021-08-21 17:32:09,304 INFO L226 Difference]: Without dead ends: 1361 [2021-08-21 17:32:09,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 17:32:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-08-21 17:32:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1133. [2021-08-21 17:32:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 1.7932862190812722) internal successors, (2030), 1132 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2030 transitions. [2021-08-21 17:32:09,316 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2030 transitions. Word has length 31 [2021-08-21 17:32:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:09,316 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2030 transitions. [2021-08-21 17:32:09,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2030 transitions. [2021-08-21 17:32:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:32:09,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:09,319 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:09,340 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 17:32:09,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:09,530 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:09,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1694652819, now seen corresponding path program 27 times [2021-08-21 17:32:09,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:09,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779667769] [2021-08-21 17:32:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:09,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:09,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:09,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779667769] [2021-08-21 17:32:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779667769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:09,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968347365] [2021-08-21 17:32:09,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:09,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:09,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:09,783 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 17:32:09,785 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 17:32:10,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:32:10,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:32:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:10,925 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 17:32:10,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968347365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:10,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:10,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:32:10,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779511473] [2021-08-21 17:32:10,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:32:10,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:32:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:32:10,927 INFO L87 Difference]: Start difference. First operand 1133 states and 2030 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:12,042 INFO L93 Difference]: Finished difference Result 1378 states and 2388 transitions. [2021-08-21 17:32:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:32:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:32:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:12,044 INFO L225 Difference]: With dead ends: 1378 [2021-08-21 17:32:12,044 INFO L226 Difference]: Without dead ends: 1366 [2021-08-21 17:32:12,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:32:12,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-08-21 17:32:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1162. [2021-08-21 17:32:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.8027562446167098) internal successors, (2093), 1161 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 2093 transitions. [2021-08-21 17:32:12,056 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 2093 transitions. Word has length 31 [2021-08-21 17:32:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:12,056 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 2093 transitions. [2021-08-21 17:32:12,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 2093 transitions. [2021-08-21 17:32:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:32:12,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:12,058 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:12,077 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 17:32:12,260 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,SelfDestructingSolverStorable35 [2021-08-21 17:32:12,260 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1255275821, now seen corresponding path program 28 times [2021-08-21 17:32:12,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:12,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579195636] [2021-08-21 17:32:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:12,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:12,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:12,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579195636] [2021-08-21 17:32:12,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579195636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:12,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917381959] [2021-08-21 17:32:12,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:12,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:12,508 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 17:32:12,509 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 17:32:13,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:13,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:32:13,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:13,638 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 17:32:13,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917381959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:13,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:13,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 17:32:13,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895472372] [2021-08-21 17:32:13,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:32:13,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:32:13,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:32:13,640 INFO L87 Difference]: Start difference. First operand 1162 states and 2093 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:14,551 INFO L93 Difference]: Finished difference Result 1301 states and 2298 transitions. [2021-08-21 17:32:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:32:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:32:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:14,553 INFO L225 Difference]: With dead ends: 1301 [2021-08-21 17:32:14,553 INFO L226 Difference]: Without dead ends: 1289 [2021-08-21 17:32:14,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:32:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-08-21 17:32:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1190. [2021-08-21 17:32:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.809924306139613) internal successors, (2152), 1189 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2152 transitions. [2021-08-21 17:32:14,565 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2152 transitions. Word has length 31 [2021-08-21 17:32:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:14,565 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 2152 transitions. [2021-08-21 17:32:14,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2152 transitions. [2021-08-21 17:32:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:14,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:14,567 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:14,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 17:32:14,776 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,SelfDestructingSolverStorable36 [2021-08-21 17:32:14,777 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2109847652, now seen corresponding path program 29 times [2021-08-21 17:32:14,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:14,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436681596] [2021-08-21 17:32:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:14,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:14,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:14,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436681596] [2021-08-21 17:32:14,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436681596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:14,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346961269] [2021-08-21 17:32:14,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:14,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:14,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:14,950 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 17:32:14,951 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 17:32:15,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:32:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:16,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346961269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:16,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:16,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-08-21 17:32:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850594780] [2021-08-21 17:32:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:32:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:32:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:32:16,109 INFO L87 Difference]: Start difference. First operand 1190 states and 2152 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:16,407 INFO L93 Difference]: Finished difference Result 1641 states and 2852 transitions. [2021-08-21 17:32:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:32:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:16,410 INFO L225 Difference]: With dead ends: 1641 [2021-08-21 17:32:16,410 INFO L226 Difference]: Without dead ends: 1625 [2021-08-21 17:32:16,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:32:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-08-21 17:32:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1393. [2021-08-21 17:32:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.7880747126436782) internal successors, (2489), 1392 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2489 transitions. [2021-08-21 17:32:16,438 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2489 transitions. Word has length 32 [2021-08-21 17:32:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:16,438 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2489 transitions. [2021-08-21 17:32:16,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2489 transitions. [2021-08-21 17:32:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:16,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:16,441 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:16,462 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 17:32:16,645 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,SelfDestructingSolverStorable37 [2021-08-21 17:32:16,645 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:16,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:16,646 INFO L82 PathProgramCache]: Analyzing trace with hash 135330982, now seen corresponding path program 30 times [2021-08-21 17:32:16,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:16,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814310903] [2021-08-21 17:32:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:16,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:16,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:16,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814310903] [2021-08-21 17:32:16,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814310903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:16,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683264026] [2021-08-21 17:32:16,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:16,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:16,804 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 17:32:16,804 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 17:32:17,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:32:17,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:17,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683264026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:17,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:17,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 17:32:17,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860107977] [2021-08-21 17:32:17,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 17:32:17,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 17:32:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:32:17,930 INFO L87 Difference]: Start difference. First operand 1393 states and 2489 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:18,540 INFO L93 Difference]: Finished difference Result 2141 states and 3659 transitions. [2021-08-21 17:32:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:32:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:18,543 INFO L225 Difference]: With dead ends: 2141 [2021-08-21 17:32:18,543 INFO L226 Difference]: Without dead ends: 2119 [2021-08-21 17:32:18,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:32:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-08-21 17:32:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1830. [2021-08-21 17:32:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 1.7566976489885182) internal successors, (3213), 1829 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3213 transitions. [2021-08-21 17:32:18,571 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3213 transitions. Word has length 32 [2021-08-21 17:32:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:18,571 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 3213 transitions. [2021-08-21 17:32:18,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3213 transitions. [2021-08-21 17:32:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:18,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:18,574 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:18,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:18,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 17:32:18,789 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash -175871908, now seen corresponding path program 31 times [2021-08-21 17:32:18,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:18,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232483218] [2021-08-21 17:32:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:18,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:19,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:19,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232483218] [2021-08-21 17:32:19,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232483218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:19,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675577792] [2021-08-21 17:32:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:19,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:19,062 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 17:32:19,063 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 17:32:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:20,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675577792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:20,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:20,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-21 17:32:20,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622729516] [2021-08-21 17:32:20,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:32:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:32:20,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:32:20,248 INFO L87 Difference]: Start difference. First operand 1830 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:20,993 INFO L93 Difference]: Finished difference Result 2141 states and 3665 transitions. [2021-08-21 17:32:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:32:20,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:20,997 INFO L225 Difference]: With dead ends: 2141 [2021-08-21 17:32:20,997 INFO L226 Difference]: Without dead ends: 2137 [2021-08-21 17:32:20,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:32:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-08-21 17:32:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1977. [2021-08-21 17:32:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 1.750506072874494) internal successors, (3459), 1976 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 3459 transitions. [2021-08-21 17:32:21,025 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 3459 transitions. Word has length 32 [2021-08-21 17:32:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:21,025 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 3459 transitions. [2021-08-21 17:32:21,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 3459 transitions. [2021-08-21 17:32:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:21,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:21,028 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:21,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:21,243 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,SelfDestructingSolverStorable39 [2021-08-21 17:32:21,243 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:21,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:21,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1655776808, now seen corresponding path program 32 times [2021-08-21 17:32:21,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:21,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038026238] [2021-08-21 17:32:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:21,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:21,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:21,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038026238] [2021-08-21 17:32:21,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038026238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:21,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027902982] [2021-08-21 17:32:21,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:21,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:21,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:21,522 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 17:32:21,523 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 17:32:22,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:22,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:22,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027902982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:22,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:22,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-21 17:32:22,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109411833] [2021-08-21 17:32:22,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:32:22,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:32:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:32:22,700 INFO L87 Difference]: Start difference. First operand 1977 states and 3459 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:23,361 INFO L93 Difference]: Finished difference Result 2093 states and 3622 transitions. [2021-08-21 17:32:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:32:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:23,365 INFO L225 Difference]: With dead ends: 2093 [2021-08-21 17:32:23,365 INFO L226 Difference]: Without dead ends: 2089 [2021-08-21 17:32:23,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 644.5ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:32:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-21 17:32:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2014. [2021-08-21 17:32:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 1.749130650769995) internal successors, (3521), 2013 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 3521 transitions. [2021-08-21 17:32:23,398 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 3521 transitions. Word has length 32 [2021-08-21 17:32:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:23,398 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 3521 transitions. [2021-08-21 17:32:23,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 3521 transitions. [2021-08-21 17:32:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:23,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:23,401 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:23,431 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 17:32:23,626 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,SelfDestructingSolverStorable40 [2021-08-21 17:32:23,627 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1407979986, now seen corresponding path program 33 times [2021-08-21 17:32:23,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:23,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401276907] [2021-08-21 17:32:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:23,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:23,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:23,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401276907] [2021-08-21 17:32:23,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401276907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:23,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790616268] [2021-08-21 17:32:23,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:23,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:23,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:23,933 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 17:32:23,934 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 17:32:24,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:32:24,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:25,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790616268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:25,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:25,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-21 17:32:25,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350688350] [2021-08-21 17:32:25,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:32:25,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:32:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:32:25,236 INFO L87 Difference]: Start difference. First operand 2014 states and 3521 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:26,367 INFO L93 Difference]: Finished difference Result 2321 states and 3993 transitions. [2021-08-21 17:32:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:32:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:26,371 INFO L225 Difference]: With dead ends: 2321 [2021-08-21 17:32:26,371 INFO L226 Difference]: Without dead ends: 2317 [2021-08-21 17:32:26,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 934.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:32:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-08-21 17:32:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2171. [2021-08-21 17:32:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 1.7465437788018434) internal successors, (3790), 2170 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3790 transitions. [2021-08-21 17:32:26,403 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3790 transitions. Word has length 32 [2021-08-21 17:32:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 3790 transitions. [2021-08-21 17:32:26,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3790 transitions. [2021-08-21 17:32:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:26,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:26,407 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:26,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:26,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 17:32:26,629 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1654484704, now seen corresponding path program 34 times [2021-08-21 17:32:26,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:26,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193345795] [2021-08-21 17:32:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:26,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:26,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:26,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193345795] [2021-08-21 17:32:26,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193345795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:26,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047056259] [2021-08-21 17:32:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:26,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:26,937 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 17:32:26,939 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 17:32:27,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:28,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047056259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:28,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:28,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-21 17:32:28,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27274611] [2021-08-21 17:32:28,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:32:28,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:32:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:32:28,262 INFO L87 Difference]: Start difference. First operand 2171 states and 3790 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:29,284 INFO L93 Difference]: Finished difference Result 2872 states and 4869 transitions. [2021-08-21 17:32:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:32:29,284 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:29,288 INFO L225 Difference]: With dead ends: 2872 [2021-08-21 17:32:29,288 INFO L226 Difference]: Without dead ends: 2854 [2021-08-21 17:32:29,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 801.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:32:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-08-21 17:32:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2463. [2021-08-21 17:32:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 1.7367993501218522) internal successors, (4276), 2462 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 17:32:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 4276 transitions. [2021-08-21 17:32:29,325 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 4276 transitions. Word has length 32 [2021-08-21 17:32:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:29,326 INFO L470 AbstractCegarLoop]: Abstraction has 2463 states and 4276 transitions. [2021-08-21 17:32:29,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 4276 transitions. [2021-08-21 17:32:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:29,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:29,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:29,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:29,544 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,SelfDestructingSolverStorable42 [2021-08-21 17:32:29,545 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1282140500, now seen corresponding path program 35 times [2021-08-21 17:32:29,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:29,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68125079] [2021-08-21 17:32:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:29,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:29,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:29,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68125079] [2021-08-21 17:32:29,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68125079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:29,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877208040] [2021-08-21 17:32:29,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:29,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:29,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:29,810 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 17:32:29,811 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 17:32:30,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:32:30,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:30,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877208040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:31,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:31,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-08-21 17:32:31,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305814639] [2021-08-21 17:32:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:32:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:32:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:32:31,113 INFO L87 Difference]: Start difference. First operand 2463 states and 4276 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:32,102 INFO L93 Difference]: Finished difference Result 2654 states and 4573 transitions. [2021-08-21 17:32:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:32:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:32,105 INFO L225 Difference]: With dead ends: 2654 [2021-08-21 17:32:32,105 INFO L226 Difference]: Without dead ends: 2650 [2021-08-21 17:32:32,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 830.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:32:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-08-21 17:32:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2545. [2021-08-21 17:32:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2544 states have (on average 1.7401729559748427) internal successors, (4427), 2544 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 4427 transitions. [2021-08-21 17:32:32,133 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 4427 transitions. Word has length 32 [2021-08-21 17:32:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:32,133 INFO L470 AbstractCegarLoop]: Abstraction has 2545 states and 4427 transitions. [2021-08-21 17:32:32,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 4427 transitions. [2021-08-21 17:32:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:32,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:32,137 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:32,161 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 17:32:32,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:32,352 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:32,353 INFO L82 PathProgramCache]: Analyzing trace with hash 684328106, now seen corresponding path program 36 times [2021-08-21 17:32:32,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:32,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287638725] [2021-08-21 17:32:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:32,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:32,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:32,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287638725] [2021-08-21 17:32:32,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287638725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:32,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506459412] [2021-08-21 17:32:32,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:32,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:32,661 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 17:32:32,662 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 17:32:33,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:32:33,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:33,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:33,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:33,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506459412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:33,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:33,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-21 17:32:33,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131889465] [2021-08-21 17:32:33,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:32:33,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:32:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:32:33,962 INFO L87 Difference]: Start difference. First operand 2545 states and 4427 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:35,091 INFO L93 Difference]: Finished difference Result 3192 states and 5415 transitions. [2021-08-21 17:32:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:32:35,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:35,095 INFO L225 Difference]: With dead ends: 3192 [2021-08-21 17:32:35,095 INFO L226 Difference]: Without dead ends: 3184 [2021-08-21 17:32:35,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 739.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:32:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-08-21 17:32:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2975. [2021-08-21 17:32:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 1.7360457296570275) internal successors, (5163), 2974 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 5163 transitions. [2021-08-21 17:32:35,124 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 5163 transitions. Word has length 32 [2021-08-21 17:32:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:35,125 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 5163 transitions. [2021-08-21 17:32:35,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 5163 transitions. [2021-08-21 17:32:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:35,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:35,127 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:35,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:35,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:35,328 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:35,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1415562446, now seen corresponding path program 37 times [2021-08-21 17:32:35,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:35,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284739305] [2021-08-21 17:32:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:35,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:35,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284739305] [2021-08-21 17:32:35,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284739305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:35,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195690980] [2021-08-21 17:32:35,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:35,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:35,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:35,517 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 17:32:35,518 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 17:32:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:36,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195690980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:36,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:36,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 17:32:36,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722153443] [2021-08-21 17:32:36,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:32:36,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:32:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:32:36,908 INFO L87 Difference]: Start difference. First operand 2975 states and 5163 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 17:32:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:37,445 INFO L93 Difference]: Finished difference Result 3230 states and 5549 transitions. [2021-08-21 17:32:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:32:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:37,449 INFO L225 Difference]: With dead ends: 3230 [2021-08-21 17:32:37,449 INFO L226 Difference]: Without dead ends: 3224 [2021-08-21 17:32:37,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:32:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-08-21 17:32:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 3062. [2021-08-21 17:32:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 1.7379941195687685) internal successors, (5320), 3061 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 5320 transitions. [2021-08-21 17:32:37,482 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 5320 transitions. Word has length 32 [2021-08-21 17:32:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:37,482 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 5320 transitions. [2021-08-21 17:32:37,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 17:32:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 5320 transitions. [2021-08-21 17:32:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:37,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:37,486 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:37,508 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 17:32:37,696 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,SelfDestructingSolverStorable45 [2021-08-21 17:32:37,696 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:37,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1646902244, now seen corresponding path program 38 times [2021-08-21 17:32:37,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:37,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71933953] [2021-08-21 17:32:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:37,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:37,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:37,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71933953] [2021-08-21 17:32:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71933953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:37,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133550468] [2021-08-21 17:32:37,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:37,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:37,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:37,886 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 17:32:37,887 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 17:32:38,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:38,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:38,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:39,312 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 17:32:39,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133550468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:39,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:39,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:32:39,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490612862] [2021-08-21 17:32:39,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:32:39,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:32:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:32:39,314 INFO L87 Difference]: Start difference. First operand 3062 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:32:39,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:39,625 INFO L93 Difference]: Finished difference Result 3436 states and 5917 transitions. [2021-08-21 17:32:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:32:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:39,629 INFO L225 Difference]: With dead ends: 3436 [2021-08-21 17:32:39,629 INFO L226 Difference]: Without dead ends: 3424 [2021-08-21 17:32:39,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:32:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-08-21 17:32:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 3316. [2021-08-21 17:32:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 1.7396681749622926) internal successors, (5767), 3315 states have internal predecessors, (5767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 5767 transitions. [2021-08-21 17:32:39,668 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 5767 transitions. Word has length 32 [2021-08-21 17:32:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:39,668 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 5767 transitions. [2021-08-21 17:32:39,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:32:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 5767 transitions. [2021-08-21 17:32:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:39,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:39,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:39,705 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 17:32:39,896 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,SelfDestructingSolverStorable46 [2021-08-21 17:32:39,897 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:39,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1274558040, now seen corresponding path program 39 times [2021-08-21 17:32:39,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:39,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193538419] [2021-08-21 17:32:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:39,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:40,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:40,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193538419] [2021-08-21 17:32:40,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193538419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:40,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008456956] [2021-08-21 17:32:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:40,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:40,089 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 17:32:40,109 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 17:32:41,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:32:41,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:41,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:41,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008456956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:41,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:41,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:32:41,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215188396] [2021-08-21 17:32:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:32:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:41,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:32:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:32:41,487 INFO L87 Difference]: Start difference. First operand 3316 states and 5767 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:42,117 INFO L93 Difference]: Finished difference Result 3947 states and 6824 transitions. [2021-08-21 17:32:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:32:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:42,121 INFO L225 Difference]: With dead ends: 3947 [2021-08-21 17:32:42,121 INFO L226 Difference]: Without dead ends: 3943 [2021-08-21 17:32:42,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:32:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-08-21 17:32:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3524. [2021-08-21 17:32:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 1.739426625035481) internal successors, (6128), 3523 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 6128 transitions. [2021-08-21 17:32:42,165 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 6128 transitions. Word has length 32 [2021-08-21 17:32:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:42,165 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 6128 transitions. [2021-08-21 17:32:42,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 6128 transitions. [2021-08-21 17:32:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:42,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:42,169 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:42,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 17:32:42,395 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,SelfDestructingSolverStorable47 [2021-08-21 17:32:42,396 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 91996004, now seen corresponding path program 40 times [2021-08-21 17:32:42,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:42,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068081309] [2021-08-21 17:32:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:42,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:42,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:42,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068081309] [2021-08-21 17:32:42,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068081309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:42,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64364834] [2021-08-21 17:32:42,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:42,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:42,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:42,572 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 17:32:42,574 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 17:32:43,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:43,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:43,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:43,981 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 17:32:43,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64364834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:43,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:43,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 17:32:43,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529241876] [2021-08-21 17:32:43,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:32:43,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:32:43,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:32:43,982 INFO L87 Difference]: Start difference. First operand 3524 states and 6128 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:44,405 INFO L93 Difference]: Finished difference Result 3935 states and 6746 transitions. [2021-08-21 17:32:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:32:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:44,412 INFO L225 Difference]: With dead ends: 3935 [2021-08-21 17:32:44,412 INFO L226 Difference]: Without dead ends: 3923 [2021-08-21 17:32:44,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:32:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2021-08-21 17:32:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3575. [2021-08-21 17:32:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 3574 states have (on average 1.7392277560156688) internal successors, (6216), 3574 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 6216 transitions. [2021-08-21 17:32:44,468 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 6216 transitions. Word has length 32 [2021-08-21 17:32:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:44,468 INFO L470 AbstractCegarLoop]: Abstraction has 3575 states and 6216 transitions. [2021-08-21 17:32:44,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 6216 transitions. [2021-08-21 17:32:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:44,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:44,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:44,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:44,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:44,689 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash 829490698, now seen corresponding path program 41 times [2021-08-21 17:32:44,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:44,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499390880] [2021-08-21 17:32:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:44,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:44,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:44,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499390880] [2021-08-21 17:32:44,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499390880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:44,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577118492] [2021-08-21 17:32:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:44,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:44,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:44,849 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 17:32:44,850 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 17:32:45,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:32:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:45,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:46,330 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 17:32:46,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577118492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:46,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:46,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:32:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728665003] [2021-08-21 17:32:46,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:32:46,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:32:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:32:46,332 INFO L87 Difference]: Start difference. First operand 3575 states and 6216 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:46,839 INFO L93 Difference]: Finished difference Result 4305 states and 7345 transitions. [2021-08-21 17:32:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:32:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:46,844 INFO L225 Difference]: With dead ends: 4305 [2021-08-21 17:32:46,844 INFO L226 Difference]: Without dead ends: 4295 [2021-08-21 17:32:46,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:32:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2021-08-21 17:32:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 3747. [2021-08-21 17:32:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 1.7386545648691938) internal successors, (6513), 3746 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 6513 transitions. [2021-08-21 17:32:46,910 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 6513 transitions. Word has length 32 [2021-08-21 17:32:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:46,910 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 6513 transitions. [2021-08-21 17:32:46,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 6513 transitions. [2021-08-21 17:32:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:46,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:46,913 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:46,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 17:32:47,114 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,SelfDestructingSolverStorable49 [2021-08-21 17:32:47,114 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1676618366, now seen corresponding path program 42 times [2021-08-21 17:32:47,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:47,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859700967] [2021-08-21 17:32:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:47,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:47,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:47,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859700967] [2021-08-21 17:32:47,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859700967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:47,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624407466] [2021-08-21 17:32:47,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:47,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:47,289 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 17:32:47,291 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 17:32:48,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:32:48,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:48,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:48,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624407466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:48,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:48,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 17:32:48,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605583884] [2021-08-21 17:32:48,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 17:32:48,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 17:32:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:32:48,898 INFO L87 Difference]: Start difference. First operand 3747 states and 6513 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:49,440 INFO L93 Difference]: Finished difference Result 4993 states and 8509 transitions. [2021-08-21 17:32:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:32:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:49,448 INFO L225 Difference]: With dead ends: 4993 [2021-08-21 17:32:49,448 INFO L226 Difference]: Without dead ends: 4981 [2021-08-21 17:32:49,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:32:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4981 states. [2021-08-21 17:32:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4981 to 4122. [2021-08-21 17:32:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 1.7430235379762193) internal successors, (7183), 4121 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 7183 transitions. [2021-08-21 17:32:49,503 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 7183 transitions. Word has length 32 [2021-08-21 17:32:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:49,503 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 7183 transitions. [2021-08-21 17:32:49,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 7183 transitions. [2021-08-21 17:32:49,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:32:49,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:49,507 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:49,527 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 17:32:49,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:49,708 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:49,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1997100312, now seen corresponding path program 43 times [2021-08-21 17:32:49,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:49,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400249338] [2021-08-21 17:32:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:49,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:49,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:49,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400249338] [2021-08-21 17:32:49,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400249338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:49,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091810774] [2021-08-21 17:32:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:49,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:49,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:49,871 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:32:49,872 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 17:32:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:32:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:51,449 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 17:32:51,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091810774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:51,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:51,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:32:51,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563027276] [2021-08-21 17:32:51,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:32:51,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:32:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:32:51,450 INFO L87 Difference]: Start difference. First operand 4122 states and 7183 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:32:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:51,779 INFO L93 Difference]: Finished difference Result 4443 states and 7680 transitions. [2021-08-21 17:32:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:32:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:32:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:51,784 INFO L225 Difference]: With dead ends: 4443 [2021-08-21 17:32:51,785 INFO L226 Difference]: Without dead ends: 4431 [2021-08-21 17:32:51,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:32:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-08-21 17:32:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 4128. [2021-08-21 17:32:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 1.7421856069784347) internal successors, (7190), 4127 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 7190 transitions. [2021-08-21 17:32:51,828 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 7190 transitions. Word has length 32 [2021-08-21 17:32:51,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:51,828 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 7190 transitions. [2021-08-21 17:32:51,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 17:32:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 7190 transitions. [2021-08-21 17:32:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:32:51,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:51,832 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:51,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 17:32:52,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 17:32:52,045 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1651711039, now seen corresponding path program 6 times [2021-08-21 17:32:52,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:52,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822022212] [2021-08-21 17:32:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:52,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 17:32:52,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:52,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822022212] [2021-08-21 17:32:52,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822022212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:52,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898316232] [2021-08-21 17:32:52,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:52,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:52,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:52,174 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 17:32:52,174 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 17:32:53,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:32:53,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:53,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:32:53,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 17:32:53,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898316232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:53,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:53,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:32:53,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927275789] [2021-08-21 17:32:53,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:32:53,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:32:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:32:53,559 INFO L87 Difference]: Start difference. First operand 4128 states and 7190 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:53,820 INFO L93 Difference]: Finished difference Result 4216 states and 7314 transitions. [2021-08-21 17:32:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:32:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:32:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:53,825 INFO L225 Difference]: With dead ends: 4216 [2021-08-21 17:32:53,825 INFO L226 Difference]: Without dead ends: 4149 [2021-08-21 17:32:53,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:32:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-08-21 17:32:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 4137. [2021-08-21 17:32:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4137 states, 4136 states have (on average 1.7412959381044488) internal successors, (7202), 4136 states have internal predecessors, (7202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 7202 transitions. [2021-08-21 17:32:53,869 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 7202 transitions. Word has length 33 [2021-08-21 17:32:53,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:53,869 INFO L470 AbstractCegarLoop]: Abstraction has 4137 states and 7202 transitions. [2021-08-21 17:32:53,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 7202 transitions. [2021-08-21 17:32:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:32:53,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:53,875 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:53,897 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 17:32:54,078 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,SelfDestructingSolverStorable52 [2021-08-21 17:32:54,078 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1015828072, now seen corresponding path program 44 times [2021-08-21 17:32:54,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:54,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799819393] [2021-08-21 17:32:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:54,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:54,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:54,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799819393] [2021-08-21 17:32:54,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799819393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:54,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888029402] [2021-08-21 17:32:54,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:54,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:54,156 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 17:32:54,157 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 17:32:55,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:32:55,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:55,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888029402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:55,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:55,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 17:32:55,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953398462] [2021-08-21 17:32:55,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:32:55,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:32:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:32:55,494 INFO L87 Difference]: Start difference. First operand 4137 states and 7202 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:55,685 INFO L93 Difference]: Finished difference Result 5548 states and 9307 transitions. [2021-08-21 17:32:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:32:55,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:32:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:55,691 INFO L225 Difference]: With dead ends: 5548 [2021-08-21 17:32:55,691 INFO L226 Difference]: Without dead ends: 5548 [2021-08-21 17:32:55,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:32:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-08-21 17:32:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 3497. [2021-08-21 17:32:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 1.705949656750572) internal successors, (5964), 3496 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 5964 transitions. [2021-08-21 17:32:55,731 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 5964 transitions. Word has length 35 [2021-08-21 17:32:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:55,731 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 5964 transitions. [2021-08-21 17:32:55,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 5964 transitions. [2021-08-21 17:32:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:32:55,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:55,734 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:55,753 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 17:32:55,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:55,937 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash -162336096, now seen corresponding path program 45 times [2021-08-21 17:32:55,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:55,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5739037] [2021-08-21 17:32:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:55,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:56,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5739037] [2021-08-21 17:32:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5739037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941890591] [2021-08-21 17:32:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:56,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:56,022 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 17:32:56,023 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 17:32:57,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:32:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:57,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:32:57,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:32:57,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941890591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:57,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:57,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 17:32:57,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299125277] [2021-08-21 17:32:57,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:32:57,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:32:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:32:57,501 INFO L87 Difference]: Start difference. First operand 3497 states and 5964 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:57,660 INFO L93 Difference]: Finished difference Result 3368 states and 5546 transitions. [2021-08-21 17:32:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:32:57,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:32:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:57,663 INFO L225 Difference]: With dead ends: 3368 [2021-08-21 17:32:57,663 INFO L226 Difference]: Without dead ends: 3368 [2021-08-21 17:32:57,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:32:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-08-21 17:32:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3044. [2021-08-21 17:32:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 1.6625041077883667) internal successors, (5059), 3043 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 5059 transitions. [2021-08-21 17:32:57,698 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 5059 transitions. Word has length 35 [2021-08-21 17:32:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:57,698 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 5059 transitions. [2021-08-21 17:32:57,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 5059 transitions. [2021-08-21 17:32:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:32:57,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:57,701 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:57,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 17:32:57,901 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,SelfDestructingSolverStorable54 [2021-08-21 17:32:57,901 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash -163486637, now seen corresponding path program 46 times [2021-08-21 17:32:57,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:57,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697551472] [2021-08-21 17:32:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:57,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:57,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:57,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697551472] [2021-08-21 17:32:57,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697551472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:57,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239784155] [2021-08-21 17:32:57,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:57,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:57,957 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 17:32:57,958 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 17:32:59,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:59,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:59,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:32:59,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:59,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239784155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:59,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:59,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 17:32:59,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149041847] [2021-08-21 17:32:59,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:32:59,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:32:59,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:59,380 INFO L87 Difference]: Start difference. First operand 3044 states and 5059 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 17:32:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:59,458 INFO L93 Difference]: Finished difference Result 3952 states and 6352 transitions. [2021-08-21 17:32:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:32:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:32:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:59,463 INFO L225 Difference]: With dead ends: 3952 [2021-08-21 17:32:59,463 INFO L226 Difference]: Without dead ends: 3952 [2021-08-21 17:32:59,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-08-21 17:32:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3683. [2021-08-21 17:32:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.6469310157523085) internal successors, (6064), 3682 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6064 transitions. [2021-08-21 17:32:59,510 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6064 transitions. Word has length 35 [2021-08-21 17:32:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:59,511 INFO L470 AbstractCegarLoop]: Abstraction has 3683 states and 6064 transitions. [2021-08-21 17:32:59,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 17:32:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6064 transitions. [2021-08-21 17:32:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:32:59,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:59,514 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:59,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:59,714 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,SelfDestructingSolverStorable55 [2021-08-21 17:32:59,714 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:59,715 INFO L82 PathProgramCache]: Analyzing trace with hash 479078527, now seen corresponding path program 47 times [2021-08-21 17:32:59,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:59,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475595988] [2021-08-21 17:32:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:59,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:32:59,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:59,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475595988] [2021-08-21 17:32:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475595988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:59,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909119926] [2021-08-21 17:32:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:59,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:59,754 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 17:32:59,755 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 17:33:01,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:33:01,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:01,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909119926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:01,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:01,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 17:33:01,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280935377] [2021-08-21 17:33:01,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:33:01,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:33:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:33:01,195 INFO L87 Difference]: Start difference. First operand 3683 states and 6064 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 17:33:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:01,250 INFO L93 Difference]: Finished difference Result 3948 states and 6344 transitions. [2021-08-21 17:33:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:33:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:01,254 INFO L225 Difference]: With dead ends: 3948 [2021-08-21 17:33:01,254 INFO L226 Difference]: Without dead ends: 3946 [2021-08-21 17:33:01,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3946 states. [2021-08-21 17:33:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3946 to 3683. [2021-08-21 17:33:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.6466594242259642) internal successors, (6063), 3682 states have internal predecessors, (6063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6063 transitions. [2021-08-21 17:33:01,304 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6063 transitions. Word has length 35 [2021-08-21 17:33:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:01,304 INFO L470 AbstractCegarLoop]: Abstraction has 3683 states and 6063 transitions. [2021-08-21 17:33:01,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 17:33:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6063 transitions. [2021-08-21 17:33:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:33:01,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:01,308 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:01,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 17:33:01,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:01,524 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:01,524 INFO L82 PathProgramCache]: Analyzing trace with hash 468640979, now seen corresponding path program 48 times [2021-08-21 17:33:01,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:01,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659650527] [2021-08-21 17:33:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:01,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:01,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:01,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659650527] [2021-08-21 17:33:01,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659650527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:01,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025806028] [2021-08-21 17:33:01,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:01,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:01,567 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 17:33:01,585 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 17:33:02,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:02,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:02,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025806028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:02,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:02,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 17:33:02,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195891573] [2021-08-21 17:33:02,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:02,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:02,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:02,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:02,946 INFO L87 Difference]: Start difference. First operand 3683 states and 6063 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 17:33:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:03,015 INFO L93 Difference]: Finished difference Result 3962 states and 6363 transitions. [2021-08-21 17:33:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:33:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:03,019 INFO L225 Difference]: With dead ends: 3962 [2021-08-21 17:33:03,019 INFO L226 Difference]: Without dead ends: 3954 [2021-08-21 17:33:03,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-08-21 17:33:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3507. [2021-08-21 17:33:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3506 states have (on average 1.6437535653166002) internal successors, (5763), 3506 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 5763 transitions. [2021-08-21 17:33:03,058 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 5763 transitions. Word has length 35 [2021-08-21 17:33:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:03,058 INFO L470 AbstractCegarLoop]: Abstraction has 3507 states and 5763 transitions. [2021-08-21 17:33:03,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 17:33:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 5763 transitions. [2021-08-21 17:33:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:33:03,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:03,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:03,081 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 17:33:03,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:03,261 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:03,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1238706177, now seen corresponding path program 49 times [2021-08-21 17:33:03,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:03,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221621925] [2021-08-21 17:33:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:03,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:03,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:03,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221621925] [2021-08-21 17:33:03,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221621925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:03,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024236013] [2021-08-21 17:33:03,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:03,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:03,323 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 17:33:03,324 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 17:33:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:04,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:04,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:04,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024236013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:04,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:04,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:33:04,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599770749] [2021-08-21 17:33:04,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:04,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:04,773 INFO L87 Difference]: Start difference. First operand 3507 states and 5763 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 17:33:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:04,849 INFO L93 Difference]: Finished difference Result 3724 states and 5992 transitions. [2021-08-21 17:33:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:04,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:33:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:04,853 INFO L225 Difference]: With dead ends: 3724 [2021-08-21 17:33:04,853 INFO L226 Difference]: Without dead ends: 3710 [2021-08-21 17:33:04,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-08-21 17:33:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3517. [2021-08-21 17:33:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3516 states have (on average 1.6430602957906713) internal successors, (5777), 3516 states have internal predecessors, (5777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 5777 transitions. [2021-08-21 17:33:04,900 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 5777 transitions. Word has length 35 [2021-08-21 17:33:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:04,900 INFO L470 AbstractCegarLoop]: Abstraction has 3517 states and 5777 transitions. [2021-08-21 17:33:04,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 17:33:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 5777 transitions. [2021-08-21 17:33:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:33:04,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:04,904 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:04,933 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 17:33:05,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:05,127 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1577987489, now seen corresponding path program 50 times [2021-08-21 17:33:05,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:05,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819202843] [2021-08-21 17:33:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:05,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:05,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:05,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819202843] [2021-08-21 17:33:05,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819202843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:05,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182812597] [2021-08-21 17:33:05,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:05,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:05,174 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 17:33:05,207 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 17:33:06,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:06,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:06,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182812597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:06,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:06,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:06,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018918694] [2021-08-21 17:33:06,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:06,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:06,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:06,617 INFO L87 Difference]: Start difference. First operand 3517 states and 5777 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 17:33:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:06,696 INFO L93 Difference]: Finished difference Result 3931 states and 6356 transitions. [2021-08-21 17:33:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:33:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:06,700 INFO L225 Difference]: With dead ends: 3931 [2021-08-21 17:33:06,700 INFO L226 Difference]: Without dead ends: 3931 [2021-08-21 17:33:06,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2021-08-21 17:33:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3755. [2021-08-21 17:33:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6307938199254128) internal successors, (6122), 3754 states have internal predecessors, (6122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6122 transitions. [2021-08-21 17:33:06,735 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6122 transitions. Word has length 35 [2021-08-21 17:33:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:06,735 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6122 transitions. [2021-08-21 17:33:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 17:33:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6122 transitions. [2021-08-21 17:33:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:33:06,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:06,737 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:06,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:06,937 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,SelfDestructingSolverStorable59 [2021-08-21 17:33:06,938 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1070063413, now seen corresponding path program 51 times [2021-08-21 17:33:06,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:06,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178077521] [2021-08-21 17:33:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:06,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:06,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:06,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178077521] [2021-08-21 17:33:06,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178077521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:06,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942923673] [2021-08-21 17:33:06,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:06,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:06,991 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 17:33:07,002 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 17:33:08,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:33:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:08,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:08,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942923673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:08,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:08,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 17:33:08,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241875420] [2021-08-21 17:33:08,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:33:08,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:33:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:33:08,384 INFO L87 Difference]: Start difference. First operand 3755 states and 6122 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 17:33:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:08,463 INFO L93 Difference]: Finished difference Result 3881 states and 6254 transitions. [2021-08-21 17:33:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:33:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:08,468 INFO L225 Difference]: With dead ends: 3881 [2021-08-21 17:33:08,468 INFO L226 Difference]: Without dead ends: 3879 [2021-08-21 17:33:08,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-08-21 17:33:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3755. [2021-08-21 17:33:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6257325519445924) internal successors, (6103), 3754 states have internal predecessors, (6103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6103 transitions. [2021-08-21 17:33:08,508 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6103 transitions. Word has length 35 [2021-08-21 17:33:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:08,508 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6103 transitions. [2021-08-21 17:33:08,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 17:33:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6103 transitions. [2021-08-21 17:33:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:33:08,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:08,512 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:08,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:08,723 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,SelfDestructingSolverStorable60 [2021-08-21 17:33:08,723 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:08,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1435807809, now seen corresponding path program 52 times [2021-08-21 17:33:08,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:08,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522110841] [2021-08-21 17:33:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:08,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:08,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:08,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522110841] [2021-08-21 17:33:08,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522110841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:08,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295710822] [2021-08-21 17:33:08,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:08,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:08,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:08,779 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 17:33:08,779 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 17:33:10,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:10,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:10,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295710822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:10,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:10,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-08-21 17:33:10,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284887935] [2021-08-21 17:33:10,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:10,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:10,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:10,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:10,197 INFO L87 Difference]: Start difference. First operand 3755 states and 6103 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:10,252 INFO L93 Difference]: Finished difference Result 3771 states and 6117 transitions. [2021-08-21 17:33:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:33:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:33:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:10,257 INFO L225 Difference]: With dead ends: 3771 [2021-08-21 17:33:10,257 INFO L226 Difference]: Without dead ends: 3769 [2021-08-21 17:33:10,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-08-21 17:33:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3755. [2021-08-21 17:33:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6217368140649973) internal successors, (6088), 3754 states have internal predecessors, (6088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6088 transitions. [2021-08-21 17:33:10,296 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6088 transitions. Word has length 35 [2021-08-21 17:33:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:10,296 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6088 transitions. [2021-08-21 17:33:10,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6088 transitions. [2021-08-21 17:33:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:33:10,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:10,299 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:10,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 17:33:10,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 17:33:10,500 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:10,500 INFO L82 PathProgramCache]: Analyzing trace with hash -853997741, now seen corresponding path program 53 times [2021-08-21 17:33:10,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:10,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931830015] [2021-08-21 17:33:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:10,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:10,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:10,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931830015] [2021-08-21 17:33:10,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931830015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:10,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986418857] [2021-08-21 17:33:10,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:10,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:10,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:10,575 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 17:33:10,577 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 17:33:11,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:33:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:11,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:12,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986418857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:12,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:12,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-08-21 17:33:12,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256618203] [2021-08-21 17:33:12,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:12,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:12,057 INFO L87 Difference]: Start difference. First operand 3755 states and 6088 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:12,125 INFO L93 Difference]: Finished difference Result 3865 states and 6202 transitions. [2021-08-21 17:33:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:33:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:12,130 INFO L225 Difference]: With dead ends: 3865 [2021-08-21 17:33:12,130 INFO L226 Difference]: Without dead ends: 3857 [2021-08-21 17:33:12,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2021-08-21 17:33:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3755. [2021-08-21 17:33:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6196057538625466) internal successors, (6080), 3754 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6080 transitions. [2021-08-21 17:33:12,173 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6080 transitions. Word has length 35 [2021-08-21 17:33:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:12,173 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6080 transitions. [2021-08-21 17:33:12,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6080 transitions. [2021-08-21 17:33:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:33:12,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:12,177 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:12,203 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 17:33:12,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:12,394 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:12,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1706388312, now seen corresponding path program 7 times [2021-08-21 17:33:12,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:12,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767135946] [2021-08-21 17:33:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:12,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:12,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:12,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767135946] [2021-08-21 17:33:12,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767135946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:12,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621483321] [2021-08-21 17:33:12,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:12,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:12,487 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 17:33:12,516 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 17:33:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:13,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:33:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:13,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621483321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:13,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:13,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 17:33:13,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212936700] [2021-08-21 17:33:13,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:13,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:13,959 INFO L87 Difference]: Start difference. First operand 3755 states and 6080 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 17:33:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:14,107 INFO L93 Difference]: Finished difference Result 4353 states and 6943 transitions. [2021-08-21 17:33:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:33:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 17:33:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:14,113 INFO L225 Difference]: With dead ends: 4353 [2021-08-21 17:33:14,113 INFO L226 Difference]: Without dead ends: 4353 [2021-08-21 17:33:14,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:33:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2021-08-21 17:33:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 3808. [2021-08-21 17:33:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 1.6088783819280272) internal successors, (6125), 3807 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 6125 transitions. [2021-08-21 17:33:14,156 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 6125 transitions. Word has length 36 [2021-08-21 17:33:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:14,156 INFO L470 AbstractCegarLoop]: Abstraction has 3808 states and 6125 transitions. [2021-08-21 17:33:14,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 17:33:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 6125 transitions. [2021-08-21 17:33:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:14,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:14,160 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:14,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 17:33:14,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:14,361 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1952180308, now seen corresponding path program 54 times [2021-08-21 17:33:14,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:14,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427012752] [2021-08-21 17:33:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:14,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:14,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:14,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427012752] [2021-08-21 17:33:14,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427012752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:14,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471041885] [2021-08-21 17:33:14,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:14,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:14,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:14,577 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 17:33:14,578 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 17:33:15,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:33:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:15,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:16,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471041885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:16,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:16,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 17:33:16,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474254479] [2021-08-21 17:33:16,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:33:16,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:16,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:33:16,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:33:16,565 INFO L87 Difference]: Start difference. First operand 3808 states and 6125 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:17,368 INFO L93 Difference]: Finished difference Result 5293 states and 8408 transitions. [2021-08-21 17:33:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:33:17,369 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:17,375 INFO L225 Difference]: With dead ends: 5293 [2021-08-21 17:33:17,375 INFO L226 Difference]: Without dead ends: 5273 [2021-08-21 17:33:17,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:33:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-08-21 17:33:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4532. [2021-08-21 17:33:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4532 states, 4531 states have (on average 1.633414257338336) internal successors, (7401), 4531 states have internal predecessors, (7401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 7401 transitions. [2021-08-21 17:33:17,423 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 7401 transitions. Word has length 38 [2021-08-21 17:33:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:17,423 INFO L470 AbstractCegarLoop]: Abstraction has 4532 states and 7401 transitions. [2021-08-21 17:33:17,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 7401 transitions. [2021-08-21 17:33:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:17,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:17,426 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:17,446 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 17:33:17,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 17:33:17,627 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash -652775076, now seen corresponding path program 55 times [2021-08-21 17:33:17,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:17,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270033343] [2021-08-21 17:33:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:17,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:17,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:17,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270033343] [2021-08-21 17:33:17,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270033343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:17,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406188535] [2021-08-21 17:33:17,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:17,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:17,853 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 17:33:17,853 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 17:33:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:19,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:19,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406188535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:19,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:19,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:33:19,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128306996] [2021-08-21 17:33:19,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:33:19,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:33:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:33:19,726 INFO L87 Difference]: Start difference. First operand 4532 states and 7401 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:20,293 INFO L93 Difference]: Finished difference Result 5044 states and 8194 transitions. [2021-08-21 17:33:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:33:20,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:20,299 INFO L225 Difference]: With dead ends: 5044 [2021-08-21 17:33:20,300 INFO L226 Difference]: Without dead ends: 5026 [2021-08-21 17:33:20,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:33:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-08-21 17:33:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 4803. [2021-08-21 17:33:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 1.6397334443981675) internal successors, (7874), 4802 states have internal predecessors, (7874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 7874 transitions. [2021-08-21 17:33:20,350 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 7874 transitions. Word has length 38 [2021-08-21 17:33:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:20,350 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 7874 transitions. [2021-08-21 17:33:20,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 7874 transitions. [2021-08-21 17:33:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:20,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:20,354 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:20,374 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 17:33:20,555 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,SelfDestructingSolverStorable65 [2021-08-21 17:33:20,555 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:20,555 INFO L82 PathProgramCache]: Analyzing trace with hash 434548782, now seen corresponding path program 56 times [2021-08-21 17:33:20,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:20,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768551043] [2021-08-21 17:33:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:20,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:20,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:20,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768551043] [2021-08-21 17:33:20,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768551043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:20,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094612181] [2021-08-21 17:33:20,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:20,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:20,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:20,789 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 17:33:20,790 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 17:33:22,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:22,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:22,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:22,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094612181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:22,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:22,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:33:22,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944078594] [2021-08-21 17:33:22,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:33:22,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:33:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:33:22,766 INFO L87 Difference]: Start difference. First operand 4803 states and 7874 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:23,513 INFO L93 Difference]: Finished difference Result 5891 states and 9595 transitions. [2021-08-21 17:33:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:33:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:23,520 INFO L225 Difference]: With dead ends: 5891 [2021-08-21 17:33:23,520 INFO L226 Difference]: Without dead ends: 5869 [2021-08-21 17:33:23,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 592.8ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:33:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2021-08-21 17:33:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 5086. [2021-08-21 17:33:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 5085 states have (on average 1.6456243854473942) internal successors, (8368), 5085 states have internal predecessors, (8368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 8368 transitions. [2021-08-21 17:33:23,590 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 8368 transitions. Word has length 38 [2021-08-21 17:33:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:23,590 INFO L470 AbstractCegarLoop]: Abstraction has 5086 states and 8368 transitions. [2021-08-21 17:33:23,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 8368 transitions. [2021-08-21 17:33:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:23,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:23,594 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:23,614 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 17:33:23,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:23,795 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:23,795 INFO L82 PathProgramCache]: Analyzing trace with hash 256256028, now seen corresponding path program 57 times [2021-08-21 17:33:23,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:23,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489000599] [2021-08-21 17:33:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:23,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:24,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:24,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489000599] [2021-08-21 17:33:24,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489000599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:24,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749464577] [2021-08-21 17:33:24,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:24,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:24,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:24,040 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 17:33:24,064 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 17:33:25,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:33:25,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:25,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749464577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:26,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:26,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:33:26,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051972400] [2021-08-21 17:33:26,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:33:26,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:26,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:33:26,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:33:26,123 INFO L87 Difference]: Start difference. First operand 5086 states and 8368 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:27,115 INFO L93 Difference]: Finished difference Result 7230 states and 11736 transitions. [2021-08-21 17:33:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:33:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:27,125 INFO L225 Difference]: With dead ends: 7230 [2021-08-21 17:33:27,125 INFO L226 Difference]: Without dead ends: 7212 [2021-08-21 17:33:27,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 656.3ms TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:33:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7212 states. [2021-08-21 17:33:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7212 to 5794. [2021-08-21 17:33:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5794 states, 5793 states have (on average 1.6599344035905403) internal successors, (9616), 5793 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5794 states to 5794 states and 9616 transitions. [2021-08-21 17:33:27,220 INFO L78 Accepts]: Start accepts. Automaton has 5794 states and 9616 transitions. Word has length 38 [2021-08-21 17:33:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:27,220 INFO L470 AbstractCegarLoop]: Abstraction has 5794 states and 9616 transitions. [2021-08-21 17:33:27,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5794 states and 9616 transitions. [2021-08-21 17:33:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:27,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:27,224 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:27,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:27,425 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,SelfDestructingSolverStorable67 [2021-08-21 17:33:27,425 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -622768028, now seen corresponding path program 58 times [2021-08-21 17:33:27,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:27,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714634394] [2021-08-21 17:33:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:27,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:27,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:27,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714634394] [2021-08-21 17:33:27,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714634394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:27,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400648955] [2021-08-21 17:33:27,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:27,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:27,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:27,795 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 17:33:27,795 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 17:33:29,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:29,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:29,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:29,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:29,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400648955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:29,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:29,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:33:29,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421279976] [2021-08-21 17:33:29,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:33:29,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:33:29,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:29,857 INFO L87 Difference]: Start difference. First operand 5794 states and 9616 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:30,967 INFO L93 Difference]: Finished difference Result 6017 states and 9939 transitions. [2021-08-21 17:33:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:33:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:30,975 INFO L225 Difference]: With dead ends: 6017 [2021-08-21 17:33:30,975 INFO L226 Difference]: Without dead ends: 6011 [2021-08-21 17:33:30,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 921.6ms TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:33:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-08-21 17:33:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 5885. [2021-08-21 17:33:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5885 states, 5884 states have (on average 1.6607749830047587) internal successors, (9772), 5884 states have internal predecessors, (9772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5885 states to 5885 states and 9772 transitions. [2021-08-21 17:33:31,062 INFO L78 Accepts]: Start accepts. Automaton has 5885 states and 9772 transitions. Word has length 38 [2021-08-21 17:33:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:31,062 INFO L470 AbstractCegarLoop]: Abstraction has 5885 states and 9772 transitions. [2021-08-21 17:33:31,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5885 states and 9772 transitions. [2021-08-21 17:33:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:31,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:31,068 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:31,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:31,282 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,SelfDestructingSolverStorable68 [2021-08-21 17:33:31,283 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1121432800, now seen corresponding path program 59 times [2021-08-21 17:33:31,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:31,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413054538] [2021-08-21 17:33:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:31,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:31,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:31,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413054538] [2021-08-21 17:33:31,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413054538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:31,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630328622] [2021-08-21 17:33:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:31,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:31,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:31,602 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 17:33:31,603 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 17:33:33,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:33:33,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:33,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:33,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:33,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630328622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:33,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:33,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:33:33,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049921893] [2021-08-21 17:33:33,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:33:33,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:33,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:33:33,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:33,696 INFO L87 Difference]: Start difference. First operand 5885 states and 9772 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:35,012 INFO L93 Difference]: Finished difference Result 6011 states and 9953 transitions. [2021-08-21 17:33:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:33:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:35,020 INFO L225 Difference]: With dead ends: 6011 [2021-08-21 17:33:35,020 INFO L226 Difference]: Without dead ends: 6005 [2021-08-21 17:33:35,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1057.3ms TimeCoverageRelationStatistics Valid=185, Invalid=2071, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:33:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2021-08-21 17:33:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5926. [2021-08-21 17:33:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.66126582278481) internal successors, (9843), 5925 states have internal predecessors, (9843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 9843 transitions. [2021-08-21 17:33:35,083 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 9843 transitions. Word has length 38 [2021-08-21 17:33:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:35,083 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 9843 transitions. [2021-08-21 17:33:35,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 9843 transitions. [2021-08-21 17:33:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:35,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:35,088 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:35,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:35,288 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,SelfDestructingSolverStorable69 [2021-08-21 17:33:35,288 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash 735424694, now seen corresponding path program 60 times [2021-08-21 17:33:35,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:35,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979837688] [2021-08-21 17:33:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:35,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:35,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:35,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979837688] [2021-08-21 17:33:35,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979837688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:35,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254433131] [2021-08-21 17:33:35,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:35,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:35,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:35,645 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 17:33:35,675 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 17:33:37,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:33:37,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:37,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:37,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254433131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:37,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:37,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:33:37,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400913002] [2021-08-21 17:33:37,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:33:37,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:33:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:37,848 INFO L87 Difference]: Start difference. First operand 5926 states and 9843 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:39,076 INFO L93 Difference]: Finished difference Result 6076 states and 10062 transitions. [2021-08-21 17:33:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:33:39,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:39,083 INFO L225 Difference]: With dead ends: 6076 [2021-08-21 17:33:39,083 INFO L226 Difference]: Without dead ends: 6070 [2021-08-21 17:33:39,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 997.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:33:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2021-08-21 17:33:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 5969. [2021-08-21 17:33:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5969 states, 5968 states have (on average 1.6616957104557641) internal successors, (9917), 5968 states have internal predecessors, (9917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5969 states to 5969 states and 9917 transitions. [2021-08-21 17:33:39,144 INFO L78 Accepts]: Start accepts. Automaton has 5969 states and 9917 transitions. Word has length 38 [2021-08-21 17:33:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:39,144 INFO L470 AbstractCegarLoop]: Abstraction has 5969 states and 9917 transitions. [2021-08-21 17:33:39,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5969 states and 9917 transitions. [2021-08-21 17:33:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:39,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:39,150 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:39,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:39,377 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,SelfDestructingSolverStorable70 [2021-08-21 17:33:39,377 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash -198232928, now seen corresponding path program 61 times [2021-08-21 17:33:39,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:39,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493745371] [2021-08-21 17:33:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:39,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:39,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:39,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493745371] [2021-08-21 17:33:39,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493745371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:39,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138533095] [2021-08-21 17:33:39,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:39,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:39,695 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 17:33:39,696 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 17:33:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:41,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:41,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138533095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:41,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:41,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:33:41,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410424597] [2021-08-21 17:33:41,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:33:41,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:41,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:33:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:41,899 INFO L87 Difference]: Start difference. First operand 5969 states and 9917 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:43,860 INFO L93 Difference]: Finished difference Result 6746 states and 11151 transitions. [2021-08-21 17:33:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 17:33:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:43,868 INFO L225 Difference]: With dead ends: 6746 [2021-08-21 17:33:43,868 INFO L226 Difference]: Without dead ends: 6734 [2021-08-21 17:33:43,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1396.9ms TimeCoverageRelationStatistics Valid=287, Invalid=3135, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:33:43,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-08-21 17:33:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6112. [2021-08-21 17:33:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 1.6633938798887253) internal successors, (10165), 6111 states have internal predecessors, (10165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 10165 transitions. [2021-08-21 17:33:43,935 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 10165 transitions. Word has length 38 [2021-08-21 17:33:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:43,935 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 10165 transitions. [2021-08-21 17:33:43,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 10165 transitions. [2021-08-21 17:33:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:43,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:43,940 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:43,963 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 17:33:44,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:44,141 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:44,141 INFO L82 PathProgramCache]: Analyzing trace with hash -7954770, now seen corresponding path program 62 times [2021-08-21 17:33:44,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:44,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493210069] [2021-08-21 17:33:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:44,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:44,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:44,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493210069] [2021-08-21 17:33:44,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493210069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:44,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31134699] [2021-08-21 17:33:44,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:44,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:44,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:44,472 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 17:33:44,476 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 17:33:46,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:46,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:46,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31134699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:46,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:46,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:33:46,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329634857] [2021-08-21 17:33:46,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:33:46,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:33:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:46,681 INFO L87 Difference]: Start difference. First operand 6112 states and 10165 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:47,762 INFO L93 Difference]: Finished difference Result 6315 states and 10470 transitions. [2021-08-21 17:33:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:33:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:47,771 INFO L225 Difference]: With dead ends: 6315 [2021-08-21 17:33:47,771 INFO L226 Difference]: Without dead ends: 6303 [2021-08-21 17:33:47,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 904.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:33:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-08-21 17:33:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 6195. [2021-08-21 17:33:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6195 states, 6194 states have (on average 1.6645140458508234) internal successors, (10310), 6194 states have internal predecessors, (10310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 10310 transitions. [2021-08-21 17:33:47,851 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 10310 transitions. Word has length 38 [2021-08-21 17:33:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:47,851 INFO L470 AbstractCegarLoop]: Abstraction has 6195 states and 10310 transitions. [2021-08-21 17:33:47,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 10310 transitions. [2021-08-21 17:33:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:47,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:47,856 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:47,877 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 17:33:48,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:48,057 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash 613293848, now seen corresponding path program 63 times [2021-08-21 17:33:48,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:48,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403913264] [2021-08-21 17:33:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:48,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:48,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:48,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403913264] [2021-08-21 17:33:48,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403913264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:48,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449463947] [2021-08-21 17:33:48,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:48,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:48,368 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 17:33:48,369 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 17:33:50,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:33:50,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:50,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:50,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449463947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:50,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:50,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:33:50,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039812434] [2021-08-21 17:33:50,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:33:50,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:33:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:50,606 INFO L87 Difference]: Start difference. First operand 6195 states and 10310 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:53,016 INFO L93 Difference]: Finished difference Result 6931 states and 11393 transitions. [2021-08-21 17:33:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 17:33:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:53,026 INFO L225 Difference]: With dead ends: 6931 [2021-08-21 17:33:53,026 INFO L226 Difference]: Without dead ends: 6913 [2021-08-21 17:33:53,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1596.5ms TimeCoverageRelationStatistics Valid=385, Invalid=4585, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 17:33:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2021-08-21 17:33:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6329. [2021-08-21 17:33:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6328 states have (on average 1.668299620733249) internal successors, (10557), 6328 states have internal predecessors, (10557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 10557 transitions. [2021-08-21 17:33:53,118 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 10557 transitions. Word has length 38 [2021-08-21 17:33:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:53,119 INFO L470 AbstractCegarLoop]: Abstraction has 6329 states and 10557 transitions. [2021-08-21 17:33:53,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 10557 transitions. [2021-08-21 17:33:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:53,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:53,124 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:53,145 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 17:33:53,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:53,324 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash 729539924, now seen corresponding path program 64 times [2021-08-21 17:33:53,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:53,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014632888] [2021-08-21 17:33:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:53,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:53,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:53,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014632888] [2021-08-21 17:33:53,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014632888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:53,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073096850] [2021-08-21 17:33:53,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:53,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:53,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:53,630 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 17:33:53,631 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 17:33:55,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:55,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:55,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:33:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:55,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073096850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:55,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:55,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:33:55,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143794966] [2021-08-21 17:33:55,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:33:55,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:33:55,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:55,979 INFO L87 Difference]: Start difference. First operand 6329 states and 10557 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:57,968 INFO L93 Difference]: Finished difference Result 8364 states and 13709 transitions. [2021-08-21 17:33:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:33:57,969 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:33:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:57,980 INFO L225 Difference]: With dead ends: 8364 [2021-08-21 17:33:57,980 INFO L226 Difference]: Without dead ends: 8342 [2021-08-21 17:33:57,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1262.7ms TimeCoverageRelationStatistics Valid=279, Invalid=3027, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:33:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2021-08-21 17:33:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 7176. [2021-08-21 17:33:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 1.6780487804878048) internal successors, (12040), 7175 states have internal predecessors, (12040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 12040 transitions. [2021-08-21 17:33:58,078 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 12040 transitions. Word has length 38 [2021-08-21 17:33:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:58,078 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 12040 transitions. [2021-08-21 17:33:58,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 12040 transitions. [2021-08-21 17:33:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:33:58,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:58,084 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:58,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 17:33:58,284 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,SelfDestructingSolverStorable74 [2021-08-21 17:33:58,284 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1386389434, now seen corresponding path program 65 times [2021-08-21 17:33:58,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:58,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851780679] [2021-08-21 17:33:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:58,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:58,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:58,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851780679] [2021-08-21 17:33:58,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851780679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:58,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97884413] [2021-08-21 17:33:58,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:58,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:58,612 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 17:33:58,613 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 17:34:00,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:34:00,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:00,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:00,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97884413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:01,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:01,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-21 17:34:01,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138316160] [2021-08-21 17:34:01,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:34:01,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:34:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:34:01,042 INFO L87 Difference]: Start difference. First operand 7176 states and 12040 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:03,027 INFO L93 Difference]: Finished difference Result 7625 states and 12723 transitions. [2021-08-21 17:34:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:34:03,037 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:03,046 INFO L225 Difference]: With dead ends: 7625 [2021-08-21 17:34:03,047 INFO L226 Difference]: Without dead ends: 7619 [2021-08-21 17:34:03,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1383.7ms TimeCoverageRelationStatistics Valid=282, Invalid=3258, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:34:03,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7619 states. [2021-08-21 17:34:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7619 to 7211. [2021-08-21 17:34:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7210 states have (on average 1.6786407766990292) internal successors, (12103), 7210 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 12103 transitions. [2021-08-21 17:34:03,133 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 12103 transitions. Word has length 38 [2021-08-21 17:34:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:03,133 INFO L470 AbstractCegarLoop]: Abstraction has 7211 states and 12103 transitions. [2021-08-21 17:34:03,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 12103 transitions. [2021-08-21 17:34:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:03,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:03,138 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:03,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 17:34:03,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:03,340 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1108231004, now seen corresponding path program 66 times [2021-08-21 17:34:03,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:03,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829693027] [2021-08-21 17:34:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:03,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:03,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:03,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829693027] [2021-08-21 17:34:03,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829693027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:03,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867724153] [2021-08-21 17:34:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:03,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:03,745 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 17:34:03,769 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 17:34:05,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:34:05,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:06,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867724153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:06,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:06,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-21 17:34:06,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133062298] [2021-08-21 17:34:06,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:34:06,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:34:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:34:06,256 INFO L87 Difference]: Start difference. First operand 7211 states and 12103 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:07,939 INFO L93 Difference]: Finished difference Result 7497 states and 12536 transitions. [2021-08-21 17:34:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:34:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:07,949 INFO L225 Difference]: With dead ends: 7497 [2021-08-21 17:34:07,949 INFO L226 Difference]: Without dead ends: 7491 [2021-08-21 17:34:07,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1147.8ms TimeCoverageRelationStatistics Valid=192, Invalid=2258, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:34:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7491 states. [2021-08-21 17:34:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7491 to 7292. [2021-08-21 17:34:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7292 states, 7291 states have (on average 1.6791935262652586) internal successors, (12243), 7291 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7292 states to 7292 states and 12243 transitions. [2021-08-21 17:34:08,036 INFO L78 Accepts]: Start accepts. Automaton has 7292 states and 12243 transitions. Word has length 38 [2021-08-21 17:34:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:08,036 INFO L470 AbstractCegarLoop]: Abstraction has 7292 states and 12243 transitions. [2021-08-21 17:34:08,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7292 states and 12243 transitions. [2021-08-21 17:34:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:08,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:08,041 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:08,063 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 17:34:08,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:08,245 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2060306596, now seen corresponding path program 67 times [2021-08-21 17:34:08,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:08,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944981608] [2021-08-21 17:34:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:08,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:08,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:08,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944981608] [2021-08-21 17:34:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944981608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:08,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915048705] [2021-08-21 17:34:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:08,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:08,617 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 17:34:08,617 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 17:34:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:11,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915048705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:11,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:11,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-21 17:34:11,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380723636] [2021-08-21 17:34:11,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:34:11,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:34:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:34:11,014 INFO L87 Difference]: Start difference. First operand 7292 states and 12243 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:12,300 INFO L93 Difference]: Finished difference Result 7411 states and 12413 transitions. [2021-08-21 17:34:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:34:12,301 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:12,310 INFO L225 Difference]: With dead ends: 7411 [2021-08-21 17:34:12,310 INFO L226 Difference]: Without dead ends: 7405 [2021-08-21 17:34:12,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1033.0ms TimeCoverageRelationStatistics Valid=180, Invalid=2076, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:34:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7405 states. [2021-08-21 17:34:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7405 to 7330. [2021-08-21 17:34:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7330 states, 7329 states have (on average 1.6796288716059489) internal successors, (12310), 7329 states have internal predecessors, (12310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7330 states to 7330 states and 12310 transitions. [2021-08-21 17:34:12,401 INFO L78 Accepts]: Start accepts. Automaton has 7330 states and 12310 transitions. Word has length 38 [2021-08-21 17:34:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:12,401 INFO L470 AbstractCegarLoop]: Abstraction has 7330 states and 12310 transitions. [2021-08-21 17:34:12,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 7330 states and 12310 transitions. [2021-08-21 17:34:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:12,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:12,406 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:12,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:12,606 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,SelfDestructingSolverStorable77 [2021-08-21 17:34:12,607 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:12,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2093952740, now seen corresponding path program 68 times [2021-08-21 17:34:12,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:12,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464299243] [2021-08-21 17:34:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:12,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:12,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:12,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464299243] [2021-08-21 17:34:12,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464299243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:12,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513420527] [2021-08-21 17:34:12,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:12,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:12,827 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 17:34:12,828 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 17:34:14,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:15,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513420527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:15,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:15,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:34:15,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426694089] [2021-08-21 17:34:15,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:34:15,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:34:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:34:15,213 INFO L87 Difference]: Start difference. First operand 7330 states and 12310 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:15,816 INFO L93 Difference]: Finished difference Result 7418 states and 12438 transitions. [2021-08-21 17:34:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:34:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:15,825 INFO L225 Difference]: With dead ends: 7418 [2021-08-21 17:34:15,825 INFO L226 Difference]: Without dead ends: 7412 [2021-08-21 17:34:15,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:34:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7412 states. [2021-08-21 17:34:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 7362. [2021-08-21 17:34:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7362 states, 7361 states have (on average 1.6802064936829235) internal successors, (12368), 7361 states have internal predecessors, (12368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 12368 transitions. [2021-08-21 17:34:15,907 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 12368 transitions. Word has length 38 [2021-08-21 17:34:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:15,907 INFO L470 AbstractCegarLoop]: Abstraction has 7362 states and 12368 transitions. [2021-08-21 17:34:15,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 12368 transitions. [2021-08-21 17:34:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:15,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:15,912 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:15,934 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 17:34:16,113 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,SelfDestructingSolverStorable78 [2021-08-21 17:34:16,113 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1707944634, now seen corresponding path program 69 times [2021-08-21 17:34:16,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:16,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001486480] [2021-08-21 17:34:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:16,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:16,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:16,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001486480] [2021-08-21 17:34:16,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001486480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:16,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006699920] [2021-08-21 17:34:16,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:34:16,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:16,331 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 17:34:16,333 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 17:34:18,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:34:18,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:18,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:18,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:34:18,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006699920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:18,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:18,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:34:18,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915135338] [2021-08-21 17:34:18,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:34:18,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:34:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:34:18,839 INFO L87 Difference]: Start difference. First operand 7362 states and 12368 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:20,012 INFO L93 Difference]: Finished difference Result 8233 states and 13722 transitions. [2021-08-21 17:34:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:34:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:20,022 INFO L225 Difference]: With dead ends: 8233 [2021-08-21 17:34:20,022 INFO L226 Difference]: Without dead ends: 8221 [2021-08-21 17:34:20,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 636.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:34:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8221 states. [2021-08-21 17:34:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8221 to 7551. [2021-08-21 17:34:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7551 states, 7550 states have (on average 1.6819867549668874) internal successors, (12699), 7550 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 12699 transitions. [2021-08-21 17:34:20,109 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 12699 transitions. Word has length 38 [2021-08-21 17:34:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:20,109 INFO L470 AbstractCegarLoop]: Abstraction has 7551 states and 12699 transitions. [2021-08-21 17:34:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 12699 transitions. [2021-08-21 17:34:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:20,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:20,114 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:20,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 17:34:20,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:20,314 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash 774287012, now seen corresponding path program 70 times [2021-08-21 17:34:20,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:20,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432760202] [2021-08-21 17:34:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:20,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:20,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:20,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432760202] [2021-08-21 17:34:20,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432760202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:20,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264899490] [2021-08-21 17:34:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:20,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:20,557 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 17:34:20,557 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 17:34:22,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:34:22,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:22,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264899490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:22,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:22,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:34:22,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835563942] [2021-08-21 17:34:22,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:34:22,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:34:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:34:22,997 INFO L87 Difference]: Start difference. First operand 7551 states and 12699 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:23,886 INFO L93 Difference]: Finished difference Result 8072 states and 13526 transitions. [2021-08-21 17:34:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:34:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:23,896 INFO L225 Difference]: With dead ends: 8072 [2021-08-21 17:34:23,896 INFO L226 Difference]: Without dead ends: 8060 [2021-08-21 17:34:23,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 678.9ms TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:34:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-08-21 17:34:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 7630. [2021-08-21 17:34:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7630 states, 7629 states have (on average 1.6825271988465067) internal successors, (12836), 7629 states have internal predecessors, (12836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7630 states to 7630 states and 12836 transitions. [2021-08-21 17:34:23,980 INFO L78 Accepts]: Start accepts. Automaton has 7630 states and 12836 transitions. Word has length 38 [2021-08-21 17:34:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:23,981 INFO L470 AbstractCegarLoop]: Abstraction has 7630 states and 12836 transitions. [2021-08-21 17:34:23,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 7630 states and 12836 transitions. [2021-08-21 17:34:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:23,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:23,985 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:24,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 17:34:24,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:24,186 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash 964565170, now seen corresponding path program 71 times [2021-08-21 17:34:24,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:24,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004237207] [2021-08-21 17:34:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:24,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:24,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:24,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004237207] [2021-08-21 17:34:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004237207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:24,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232145565] [2021-08-21 17:34:24,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:34:24,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:24,404 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 17:34:24,405 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 17:34:26,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:34:26,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:26,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:26,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232145565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:26,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:26,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:34:26,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327681320] [2021-08-21 17:34:26,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:26,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:26,945 INFO L87 Difference]: Start difference. First operand 7630 states and 12836 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:27,546 INFO L93 Difference]: Finished difference Result 7739 states and 12993 transitions. [2021-08-21 17:34:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:27,558 INFO L225 Difference]: With dead ends: 7739 [2021-08-21 17:34:27,558 INFO L226 Difference]: Without dead ends: 7727 [2021-08-21 17:34:27,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:34:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-08-21 17:34:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7681. [2021-08-21 17:34:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7681 states, 7680 states have (on average 1.683203125) internal successors, (12927), 7680 states have internal predecessors, (12927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7681 states to 7681 states and 12927 transitions. [2021-08-21 17:34:27,653 INFO L78 Accepts]: Start accepts. Automaton has 7681 states and 12927 transitions. Word has length 38 [2021-08-21 17:34:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:27,654 INFO L470 AbstractCegarLoop]: Abstraction has 7681 states and 12927 transitions. [2021-08-21 17:34:27,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7681 states and 12927 transitions. [2021-08-21 17:34:27,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:27,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:27,661 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:27,685 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 17:34:27,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 17:34:27,866 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1702059864, now seen corresponding path program 72 times [2021-08-21 17:34:27,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:27,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029607879] [2021-08-21 17:34:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:27,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:28,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:28,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029607879] [2021-08-21 17:34:28,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029607879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:28,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396739108] [2021-08-21 17:34:28,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:28,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:28,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:28,087 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 17:34:28,088 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 17:34:30,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:34:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:30,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:30,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396739108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:30,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:30,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 17:34:30,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744925145] [2021-08-21 17:34:30,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:34:30,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:34:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:34:30,728 INFO L87 Difference]: Start difference. First operand 7681 states and 12927 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:31,592 INFO L93 Difference]: Finished difference Result 9500 states and 15743 transitions. [2021-08-21 17:34:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:34:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:31,606 INFO L225 Difference]: With dead ends: 9500 [2021-08-21 17:34:31,606 INFO L226 Difference]: Without dead ends: 9472 [2021-08-21 17:34:31,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:34:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2021-08-21 17:34:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 8699. [2021-08-21 17:34:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8699 states, 8698 states have (on average 1.6911933777879973) internal successors, (14710), 8698 states have internal predecessors, (14710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8699 states to 8699 states and 14710 transitions. [2021-08-21 17:34:31,768 INFO L78 Accepts]: Start accepts. Automaton has 8699 states and 14710 transitions. Word has length 38 [2021-08-21 17:34:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:31,768 INFO L470 AbstractCegarLoop]: Abstraction has 8699 states and 14710 transitions. [2021-08-21 17:34:31,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 8699 states and 14710 transitions. [2021-08-21 17:34:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:31,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:31,773 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:31,795 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 17:34:31,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:31,973 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1936057922, now seen corresponding path program 73 times [2021-08-21 17:34:31,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:31,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731185480] [2021-08-21 17:34:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:31,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:32,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:32,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731185480] [2021-08-21 17:34:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731185480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:32,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400638428] [2021-08-21 17:34:32,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:32,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:32,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:32,192 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 17:34:32,193 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 17:34:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:34,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400638428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:34,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:34,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:34:34,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601447035] [2021-08-21 17:34:34,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:34:34,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:34:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:34:34,723 INFO L87 Difference]: Start difference. First operand 8699 states and 14710 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:35,503 INFO L93 Difference]: Finished difference Result 8965 states and 15124 transitions. [2021-08-21 17:34:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:34:35,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:35,516 INFO L225 Difference]: With dead ends: 8965 [2021-08-21 17:34:35,517 INFO L226 Difference]: Without dead ends: 8959 [2021-08-21 17:34:35,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:34:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2021-08-21 17:34:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 8728. [2021-08-21 17:34:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 1.6917612008708605) internal successors, (14764), 8727 states have internal predecessors, (14764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 14764 transitions. [2021-08-21 17:34:35,625 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 14764 transitions. Word has length 38 [2021-08-21 17:34:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:35,625 INFO L470 AbstractCegarLoop]: Abstraction has 8728 states and 14764 transitions. [2021-08-21 17:34:35,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 14764 transitions. [2021-08-21 17:34:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:35,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:35,632 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:35,654 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 17:34:35,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:35,833 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash -232089820, now seen corresponding path program 74 times [2021-08-21 17:34:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:35,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656080204] [2021-08-21 17:34:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:35,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:36,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:36,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656080204] [2021-08-21 17:34:36,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656080204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:36,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150140755] [2021-08-21 17:34:36,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:36,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:36,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:36,097 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 17:34:36,099 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 17:34:38,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:38,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:38,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150140755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:38,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:38,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:34:38,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183451747] [2021-08-21 17:34:38,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:34:38,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:34:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:34:38,680 INFO L87 Difference]: Start difference. First operand 8728 states and 14764 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:39,275 INFO L93 Difference]: Finished difference Result 8860 states and 14955 transitions. [2021-08-21 17:34:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:34:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:39,287 INFO L225 Difference]: With dead ends: 8860 [2021-08-21 17:34:39,287 INFO L226 Difference]: Without dead ends: 8854 [2021-08-21 17:34:39,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:34:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8854 states. [2021-08-21 17:34:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8854 to 8757. [2021-08-21 17:34:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8756 states have (on average 1.692439470077661) internal successors, (14819), 8756 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 14819 transitions. [2021-08-21 17:34:39,382 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 14819 transitions. Word has length 38 [2021-08-21 17:34:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:39,383 INFO L470 AbstractCegarLoop]: Abstraction has 8757 states and 14819 transitions. [2021-08-21 17:34:39,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:39,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 14819 transitions. [2021-08-21 17:34:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:39,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:39,388 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:39,410 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 17:34:39,589 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,SelfDestructingSolverStorable84 [2021-08-21 17:34:39,589 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1165747442, now seen corresponding path program 75 times [2021-08-21 17:34:39,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:39,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074562812] [2021-08-21 17:34:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:39,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:39,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:39,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074562812] [2021-08-21 17:34:39,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074562812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:39,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448623925] [2021-08-21 17:34:39,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:34:39,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:39,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:39,817 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 17:34:39,818 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 17:34:41,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:34:41,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:41,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:42,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448623925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:42,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:42,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:34:42,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748846895] [2021-08-21 17:34:42,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:34:42,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:34:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:34:42,448 INFO L87 Difference]: Start difference. First operand 8757 states and 14819 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:43,445 INFO L93 Difference]: Finished difference Result 9974 states and 16714 transitions. [2021-08-21 17:34:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:34:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:43,460 INFO L225 Difference]: With dead ends: 9974 [2021-08-21 17:34:43,460 INFO L226 Difference]: Without dead ends: 9962 [2021-08-21 17:34:43,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:34:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9962 states. [2021-08-21 17:34:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9962 to 8892. [2021-08-21 17:34:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8892 states, 8891 states have (on average 1.6927229782926554) internal successors, (15050), 8891 states have internal predecessors, (15050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8892 states to 8892 states and 15050 transitions. [2021-08-21 17:34:43,583 INFO L78 Accepts]: Start accepts. Automaton has 8892 states and 15050 transitions. Word has length 38 [2021-08-21 17:34:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 8892 states and 15050 transitions. [2021-08-21 17:34:43,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 8892 states and 15050 transitions. [2021-08-21 17:34:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:43,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:43,592 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:43,621 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 17:34:43,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:43,817 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:43,817 INFO L82 PathProgramCache]: Analyzing trace with hash -354220666, now seen corresponding path program 76 times [2021-08-21 17:34:43,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:43,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134588161] [2021-08-21 17:34:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:43,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:44,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:44,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134588161] [2021-08-21 17:34:44,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134588161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:44,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962611692] [2021-08-21 17:34:44,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:44,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:44,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:44,077 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 17:34:44,078 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 17:34:46,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:34:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:46,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962611692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:46,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:46,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:34:46,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663867276] [2021-08-21 17:34:46,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:34:46,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:34:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:34:46,796 INFO L87 Difference]: Start difference. First operand 8892 states and 15050 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:47,538 INFO L93 Difference]: Finished difference Result 9666 states and 16272 transitions. [2021-08-21 17:34:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:47,551 INFO L225 Difference]: With dead ends: 9666 [2021-08-21 17:34:47,552 INFO L226 Difference]: Without dead ends: 9648 [2021-08-21 17:34:47,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:34:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9648 states. [2021-08-21 17:34:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9648 to 9075. [2021-08-21 17:34:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 9074 states have (on average 1.6937403570641394) internal successors, (15369), 9074 states have internal predecessors, (15369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 15369 transitions. [2021-08-21 17:34:47,667 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 15369 transitions. Word has length 38 [2021-08-21 17:34:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:47,667 INFO L470 AbstractCegarLoop]: Abstraction has 9075 states and 15369 transitions. [2021-08-21 17:34:47,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 15369 transitions. [2021-08-21 17:34:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:47,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:47,673 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:47,695 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 17:34:47,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:47,873 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:47,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash 604701506, now seen corresponding path program 77 times [2021-08-21 17:34:47,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:47,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971041289] [2021-08-21 17:34:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:47,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:48,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:48,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971041289] [2021-08-21 17:34:48,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971041289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:48,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137594476] [2021-08-21 17:34:48,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:34:48,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:48,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:48,092 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 17:34:48,093 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 17:34:50,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:34:50,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:50,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:50,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137594476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:50,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:34:50,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071591008] [2021-08-21 17:34:50,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:50,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:50,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:50,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:50,829 INFO L87 Difference]: Start difference. First operand 9075 states and 15369 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:51,608 INFO L93 Difference]: Finished difference Result 9535 states and 16060 transitions. [2021-08-21 17:34:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:34:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:51,622 INFO L225 Difference]: With dead ends: 9535 [2021-08-21 17:34:51,622 INFO L226 Difference]: Without dead ends: 9523 [2021-08-21 17:34:51,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 648.7ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:34:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-08-21 17:34:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 9131. [2021-08-21 17:34:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 1.6947426067907996) internal successors, (15473), 9130 states have internal predecessors, (15473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 15473 transitions. [2021-08-21 17:34:51,736 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 15473 transitions. Word has length 38 [2021-08-21 17:34:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:51,736 INFO L470 AbstractCegarLoop]: Abstraction has 9131 states and 15473 transitions. [2021-08-21 17:34:51,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 15473 transitions. [2021-08-21 17:34:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:51,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:51,742 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:51,764 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 17:34:51,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 17:34:51,943 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:51,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2075745518, now seen corresponding path program 78 times [2021-08-21 17:34:51,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:51,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886861305] [2021-08-21 17:34:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:51,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:52,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:52,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886861305] [2021-08-21 17:34:52,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886861305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:52,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496643188] [2021-08-21 17:34:52,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:52,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:52,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:52,156 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 17:34:52,157 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 17:34:54,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:34:54,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:54,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496643188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:54,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:54,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:34:54,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729939830] [2021-08-21 17:34:54,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:34:54,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:54,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:34:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:34:54,896 INFO L87 Difference]: Start difference. First operand 9131 states and 15473 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:55,464 INFO L93 Difference]: Finished difference Result 9230 states and 15615 transitions. [2021-08-21 17:34:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:34:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:55,477 INFO L225 Difference]: With dead ends: 9230 [2021-08-21 17:34:55,477 INFO L226 Difference]: Without dead ends: 9224 [2021-08-21 17:34:55,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 512.9ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:34:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2021-08-21 17:34:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 9157. [2021-08-21 17:34:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 1.695391000436872) internal successors, (15523), 9156 states have internal predecessors, (15523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 15523 transitions. [2021-08-21 17:34:55,587 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 15523 transitions. Word has length 38 [2021-08-21 17:34:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:55,587 INFO L470 AbstractCegarLoop]: Abstraction has 9157 states and 15523 transitions. [2021-08-21 17:34:55,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 15523 transitions. [2021-08-21 17:34:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:55,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:55,593 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:55,619 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 17:34:55,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:55,795 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1551755548, now seen corresponding path program 79 times [2021-08-21 17:34:55,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:55,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988492361] [2021-08-21 17:34:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:55,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:56,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:56,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988492361] [2021-08-21 17:34:56,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988492361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:56,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350106329] [2021-08-21 17:34:56,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:56,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:56,047 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 17:34:56,049 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 17:34:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:58,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:34:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:58,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350106329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:58,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:58,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:34:58,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346182929] [2021-08-21 17:34:58,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:34:58,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:34:58,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:34:58,816 INFO L87 Difference]: Start difference. First operand 9157 states and 15523 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:59,623 INFO L93 Difference]: Finished difference Result 9546 states and 16091 transitions. [2021-08-21 17:34:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:34:59,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:34:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:59,635 INFO L225 Difference]: With dead ends: 9546 [2021-08-21 17:34:59,636 INFO L226 Difference]: Without dead ends: 9534 [2021-08-21 17:34:59,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:34:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9534 states. [2021-08-21 17:34:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 9243. [2021-08-21 17:34:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9243 states, 9242 states have (on average 1.6964942653105388) internal successors, (15679), 9242 states have internal predecessors, (15679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9243 states to 9243 states and 15679 transitions. [2021-08-21 17:34:59,742 INFO L78 Accepts]: Start accepts. Automaton has 9243 states and 15679 transitions. Word has length 38 [2021-08-21 17:34:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:59,742 INFO L470 AbstractCegarLoop]: Abstraction has 9243 states and 15679 transitions. [2021-08-21 17:34:59,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9243 states and 15679 transitions. [2021-08-21 17:34:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:34:59,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:59,748 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:59,769 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 17:34:59,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:59,948 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1361477390, now seen corresponding path program 80 times [2021-08-21 17:34:59,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:59,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183121082] [2021-08-21 17:34:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:59,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:00,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:00,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183121082] [2021-08-21 17:35:00,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183121082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:00,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208111827] [2021-08-21 17:35:00,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:00,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:00,169 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 17:35:00,169 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 17:35:02,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:02,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:02,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:03,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208111827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:03,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:03,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:35:03,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018236614] [2021-08-21 17:35:03,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:35:03,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:35:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:03,106 INFO L87 Difference]: Start difference. First operand 9243 states and 15679 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:03,770 INFO L93 Difference]: Finished difference Result 9415 states and 15920 transitions. [2021-08-21 17:35:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:35:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:03,784 INFO L225 Difference]: With dead ends: 9415 [2021-08-21 17:35:03,784 INFO L226 Difference]: Without dead ends: 9403 [2021-08-21 17:35:03,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:35:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9403 states. [2021-08-21 17:35:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9403 to 9288. [2021-08-21 17:35:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9288 states, 9287 states have (on average 1.6974265101755142) internal successors, (15764), 9287 states have internal predecessors, (15764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9288 states to 9288 states and 15764 transitions. [2021-08-21 17:35:03,897 INFO L78 Accepts]: Start accepts. Automaton has 9288 states and 15764 transitions. Word has length 38 [2021-08-21 17:35:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:03,898 INFO L470 AbstractCegarLoop]: Abstraction has 9288 states and 15764 transitions. [2021-08-21 17:35:03,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9288 states and 15764 transitions. [2021-08-21 17:35:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:03,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:03,906 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:03,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:04,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:04,133 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash -623982696, now seen corresponding path program 81 times [2021-08-21 17:35:04,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:04,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588442901] [2021-08-21 17:35:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:04,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:04,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:04,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588442901] [2021-08-21 17:35:04,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588442901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:04,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359803115] [2021-08-21 17:35:04,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:04,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:04,352 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 17:35:04,352 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 17:35:06,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:35:06,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:07,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359803115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:07,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:07,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:35:07,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775305369] [2021-08-21 17:35:07,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:35:07,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:35:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:07,238 INFO L87 Difference]: Start difference. First operand 9288 states and 15764 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:08,121 INFO L93 Difference]: Finished difference Result 10294 states and 17358 transitions. [2021-08-21 17:35:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:35:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:08,136 INFO L225 Difference]: With dead ends: 10294 [2021-08-21 17:35:08,136 INFO L226 Difference]: Without dead ends: 10280 [2021-08-21 17:35:08,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:35:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10280 states. [2021-08-21 17:35:08,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10280 to 9437. [2021-08-21 17:35:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9437 states, 9436 states have (on average 1.698601102161933) internal successors, (16028), 9436 states have internal predecessors, (16028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9437 states to 9437 states and 16028 transitions. [2021-08-21 17:35:08,258 INFO L78 Accepts]: Start accepts. Automaton has 9437 states and 16028 transitions. Word has length 38 [2021-08-21 17:35:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:08,258 INFO L470 AbstractCegarLoop]: Abstraction has 9437 states and 16028 transitions. [2021-08-21 17:35:08,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 9437 states and 16028 transitions. [2021-08-21 17:35:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:08,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:08,264 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:08,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 17:35:08,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 17:35:08,465 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash -52519542, now seen corresponding path program 82 times [2021-08-21 17:35:08,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:08,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918670570] [2021-08-21 17:35:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:08,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:08,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:08,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918670570] [2021-08-21 17:35:08,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918670570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:08,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800403823] [2021-08-21 17:35:08,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:08,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:08,693 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 17:35:08,694 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 17:35:11,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:11,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:11,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800403823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:11,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:11,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:35:11,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036954143] [2021-08-21 17:35:11,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:35:11,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:35:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:35:11,599 INFO L87 Difference]: Start difference. First operand 9437 states and 16028 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:12,389 INFO L93 Difference]: Finished difference Result 9612 states and 16293 transitions. [2021-08-21 17:35:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:35:12,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:12,403 INFO L225 Difference]: With dead ends: 9612 [2021-08-21 17:35:12,403 INFO L226 Difference]: Without dead ends: 9600 [2021-08-21 17:35:12,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 640.9ms TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:35:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9600 states. [2021-08-21 17:35:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9600 to 9513. [2021-08-21 17:35:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9513 states, 9512 states have (on average 1.6990117746005047) internal successors, (16161), 9512 states have internal predecessors, (16161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9513 states to 9513 states and 16161 transitions. [2021-08-21 17:35:12,520 INFO L78 Accepts]: Start accepts. Automaton has 9513 states and 16161 transitions. Word has length 38 [2021-08-21 17:35:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:12,520 INFO L470 AbstractCegarLoop]: Abstraction has 9513 states and 16161 transitions. [2021-08-21 17:35:12,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9513 states and 16161 transitions. [2021-08-21 17:35:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:12,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:12,527 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:12,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 17:35:12,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:12,727 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash 137758616, now seen corresponding path program 83 times [2021-08-21 17:35:12,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:12,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637766566] [2021-08-21 17:35:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:12,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:12,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:12,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637766566] [2021-08-21 17:35:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637766566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:12,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370709464] [2021-08-21 17:35:12,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:12,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:12,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:12,944 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 17:35:12,945 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 17:35:15,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:35:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:15,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370709464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:15,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:15,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:35:15,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778707239] [2021-08-21 17:35:15,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:35:15,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:15,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:35:15,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:15,970 INFO L87 Difference]: Start difference. First operand 9513 states and 16161 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:16,637 INFO L93 Difference]: Finished difference Result 9617 states and 16311 transitions. [2021-08-21 17:35:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:35:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:16,651 INFO L225 Difference]: With dead ends: 9617 [2021-08-21 17:35:16,651 INFO L226 Difference]: Without dead ends: 9605 [2021-08-21 17:35:16,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:35:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-08-21 17:35:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 9558. [2021-08-21 17:35:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9558 states, 9557 states have (on average 1.6996965574971226) internal successors, (16244), 9557 states have internal predecessors, (16244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9558 states to 9558 states and 16244 transitions. [2021-08-21 17:35:16,767 INFO L78 Accepts]: Start accepts. Automaton has 9558 states and 16244 transitions. Word has length 38 [2021-08-21 17:35:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:16,767 INFO L470 AbstractCegarLoop]: Abstraction has 9558 states and 16244 transitions. [2021-08-21 17:35:16,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 9558 states and 16244 transitions. [2021-08-21 17:35:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:16,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:16,774 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:16,797 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 17:35:16,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:16,975 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash 759007234, now seen corresponding path program 84 times [2021-08-21 17:35:16,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:16,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491854046] [2021-08-21 17:35:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:16,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:17,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:17,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491854046] [2021-08-21 17:35:17,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491854046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:17,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711639237] [2021-08-21 17:35:17,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:17,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:17,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:17,194 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 17:35:17,195 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 17:35:19,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:35:19,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:19,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:20,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711639237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:20,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:20,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 17:35:20,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384766883] [2021-08-21 17:35:20,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:35:20,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:20,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:35:20,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:35:20,384 INFO L87 Difference]: Start difference. First operand 9558 states and 16244 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:21,633 INFO L93 Difference]: Finished difference Result 10749 states and 18174 transitions. [2021-08-21 17:35:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:35:21,634 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:21,648 INFO L225 Difference]: With dead ends: 10749 [2021-08-21 17:35:21,648 INFO L226 Difference]: Without dead ends: 10725 [2021-08-21 17:35:21,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:35:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10725 states. [2021-08-21 17:35:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10725 to 9558. [2021-08-21 17:35:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9558 states, 9557 states have (on average 1.6996965574971226) internal successors, (16244), 9557 states have internal predecessors, (16244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9558 states to 9558 states and 16244 transitions. [2021-08-21 17:35:21,767 INFO L78 Accepts]: Start accepts. Automaton has 9558 states and 16244 transitions. Word has length 38 [2021-08-21 17:35:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:21,767 INFO L470 AbstractCegarLoop]: Abstraction has 9558 states and 16244 transitions. [2021-08-21 17:35:21,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 9558 states and 16244 transitions. [2021-08-21 17:35:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:21,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:21,774 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:21,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 17:35:21,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:21,974 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1532102820, now seen corresponding path program 85 times [2021-08-21 17:35:21,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:21,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572626770] [2021-08-21 17:35:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:21,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:22,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:22,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572626770] [2021-08-21 17:35:22,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572626770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:22,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661886784] [2021-08-21 17:35:22,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:22,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:22,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:22,201 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 17:35:22,201 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 17:35:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:24,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:24,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:25,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661886784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:25,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:25,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:35:25,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321184304] [2021-08-21 17:35:25,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:35:25,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:25,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:35:25,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:35:25,265 INFO L87 Difference]: Start difference. First operand 9558 states and 16244 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:25,914 INFO L93 Difference]: Finished difference Result 9638 states and 16361 transitions. [2021-08-21 17:35:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:35:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:25,931 INFO L225 Difference]: With dead ends: 9638 [2021-08-21 17:35:25,932 INFO L226 Difference]: Without dead ends: 9632 [2021-08-21 17:35:25,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:35:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-08-21 17:35:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 9584. [2021-08-21 17:35:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9584 states, 9583 states have (on average 1.7003026192215382) internal successors, (16294), 9583 states have internal predecessors, (16294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9584 states to 9584 states and 16294 transitions. [2021-08-21 17:35:26,087 INFO L78 Accepts]: Start accepts. Automaton has 9584 states and 16294 transitions. Word has length 38 [2021-08-21 17:35:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 9584 states and 16294 transitions. [2021-08-21 17:35:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9584 states and 16294 transitions. [2021-08-21 17:35:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:26,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:26,094 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:26,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 17:35:26,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:26,294 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1884087528, now seen corresponding path program 86 times [2021-08-21 17:35:26,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:26,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048103830] [2021-08-21 17:35:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:26,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:26,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:26,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048103830] [2021-08-21 17:35:26,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048103830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:26,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617673185] [2021-08-21 17:35:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:26,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:26,512 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 17:35:26,512 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 17:35:29,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:29,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:29,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:29,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:29,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617673185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:29,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:29,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:35:29,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272070783] [2021-08-21 17:35:29,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:35:29,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:35:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:35:29,614 INFO L87 Difference]: Start difference. First operand 9584 states and 16294 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:30,170 INFO L93 Difference]: Finished difference Result 9792 states and 16621 transitions. [2021-08-21 17:35:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:35:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:30,185 INFO L225 Difference]: With dead ends: 9792 [2021-08-21 17:35:30,185 INFO L226 Difference]: Without dead ends: 9780 [2021-08-21 17:35:30,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:35:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9780 states. [2021-08-21 17:35:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9780 to 9705. [2021-08-21 17:35:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9705 states, 9704 states have (on average 1.7012572135201978) internal successors, (16509), 9704 states have internal predecessors, (16509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9705 states to 9705 states and 16509 transitions. [2021-08-21 17:35:30,303 INFO L78 Accepts]: Start accepts. Automaton has 9705 states and 16509 transitions. Word has length 38 [2021-08-21 17:35:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:30,303 INFO L470 AbstractCegarLoop]: Abstraction has 9705 states and 16509 transitions. [2021-08-21 17:35:30,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 9705 states and 16509 transitions. [2021-08-21 17:35:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:30,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:30,311 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:30,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 17:35:30,511 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,SelfDestructingSolverStorable96 [2021-08-21 17:35:30,512 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1280587154, now seen corresponding path program 87 times [2021-08-21 17:35:30,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:30,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983849923] [2021-08-21 17:35:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:30,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:30,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:30,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983849923] [2021-08-21 17:35:30,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983849923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:30,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383288694] [2021-08-21 17:35:30,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:30,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:30,761 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 17:35:30,791 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 17:35:33,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:35:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:33,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:33,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383288694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:33,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:33,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:35:33,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976496004] [2021-08-21 17:35:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:35:33,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:35:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:33,950 INFO L87 Difference]: Start difference. First operand 9705 states and 16509 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:35,109 INFO L93 Difference]: Finished difference Result 10383 states and 17541 transitions. [2021-08-21 17:35:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:35:35,109 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:35,123 INFO L225 Difference]: With dead ends: 10383 [2021-08-21 17:35:35,123 INFO L226 Difference]: Without dead ends: 10371 [2021-08-21 17:35:35,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:35:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10371 states. [2021-08-21 17:35:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 9763. [2021-08-21 17:35:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9763 states, 9762 states have (on average 1.7022126613398894) internal successors, (16617), 9762 states have internal predecessors, (16617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9763 states to 9763 states and 16617 transitions. [2021-08-21 17:35:35,239 INFO L78 Accepts]: Start accepts. Automaton has 9763 states and 16617 transitions. Word has length 38 [2021-08-21 17:35:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:35,239 INFO L470 AbstractCegarLoop]: Abstraction has 9763 states and 16617 transitions. [2021-08-21 17:35:35,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9763 states and 16617 transitions. [2021-08-21 17:35:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:35,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:35,245 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:35,269 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 17:35:35,446 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,SelfDestructingSolverStorable97 [2021-08-21 17:35:35,446 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:35,446 INFO L82 PathProgramCache]: Analyzing trace with hash -659338536, now seen corresponding path program 88 times [2021-08-21 17:35:35,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:35,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845487482] [2021-08-21 17:35:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:35,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:35,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:35,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845487482] [2021-08-21 17:35:35,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845487482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:35,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564330004] [2021-08-21 17:35:35,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:35,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:35,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:35,705 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 17:35:35,705 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 17:35:38,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:38,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:38,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:38,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:39,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564330004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:39,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:39,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:35:39,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953660012] [2021-08-21 17:35:39,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:35:39,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:35:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:39,006 INFO L87 Difference]: Start difference. First operand 9763 states and 16617 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:39,694 INFO L93 Difference]: Finished difference Result 10499 states and 17774 transitions. [2021-08-21 17:35:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:35:39,696 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:39,710 INFO L225 Difference]: With dead ends: 10499 [2021-08-21 17:35:39,710 INFO L226 Difference]: Without dead ends: 10481 [2021-08-21 17:35:39,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:35:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10481 states. [2021-08-21 17:35:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10481 to 9765. [2021-08-21 17:35:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9765 states, 9764 states have (on average 1.702376075378943) internal successors, (16622), 9764 states have internal predecessors, (16622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9765 states to 9765 states and 16622 transitions. [2021-08-21 17:35:39,830 INFO L78 Accepts]: Start accepts. Automaton has 9765 states and 16622 transitions. Word has length 38 [2021-08-21 17:35:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:39,831 INFO L470 AbstractCegarLoop]: Abstraction has 9765 states and 16622 transitions. [2021-08-21 17:35:39,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9765 states and 16622 transitions. [2021-08-21 17:35:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:39,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:39,837 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:39,860 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 17:35:40,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:40,038 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1914103908, now seen corresponding path program 89 times [2021-08-21 17:35:40,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:40,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946361687] [2021-08-21 17:35:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:40,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:40,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:40,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946361687] [2021-08-21 17:35:40,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946361687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:40,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163514942] [2021-08-21 17:35:40,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:40,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:40,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:40,312 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 17:35:40,312 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 17:35:43,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:35:43,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:43,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:43,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:43,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163514942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:43,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:43,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:35:43,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442040726] [2021-08-21 17:35:43,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:35:43,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:35:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:35:43,491 INFO L87 Difference]: Start difference. First operand 9765 states and 16622 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:44,042 INFO L93 Difference]: Finished difference Result 9842 states and 16735 transitions. [2021-08-21 17:35:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:35:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:44,056 INFO L225 Difference]: With dead ends: 9842 [2021-08-21 17:35:44,056 INFO L226 Difference]: Without dead ends: 9836 [2021-08-21 17:35:44,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:35:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-08-21 17:35:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9791. [2021-08-21 17:35:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9791 states, 9790 states have (on average 1.7029622063329928) internal successors, (16672), 9790 states have internal predecessors, (16672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 16672 transitions. [2021-08-21 17:35:44,177 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 16672 transitions. Word has length 38 [2021-08-21 17:35:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:44,177 INFO L470 AbstractCegarLoop]: Abstraction has 9791 states and 16672 transitions. [2021-08-21 17:35:44,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 16672 transitions. [2021-08-21 17:35:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:44,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:44,184 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:44,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 17:35:44,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:44,385 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:44,385 INFO L82 PathProgramCache]: Analyzing trace with hash 142853822, now seen corresponding path program 90 times [2021-08-21 17:35:44,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:44,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055330895] [2021-08-21 17:35:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:44,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:44,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:44,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055330895] [2021-08-21 17:35:44,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055330895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:44,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60207258] [2021-08-21 17:35:44,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:44,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:44,602 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 17:35:44,602 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 17:35:47,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:35:47,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:47,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60207258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:47,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:47,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:35:47,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057454633] [2021-08-21 17:35:47,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:35:47,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:35:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:35:47,866 INFO L87 Difference]: Start difference. First operand 9791 states and 16672 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:48,404 INFO L93 Difference]: Finished difference Result 9884 states and 16807 transitions. [2021-08-21 17:35:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:35:48,405 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:48,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:48,418 INFO L225 Difference]: With dead ends: 9884 [2021-08-21 17:35:48,418 INFO L226 Difference]: Without dead ends: 9878 [2021-08-21 17:35:48,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:35:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9878 states. [2021-08-21 17:35:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9878 to 9818. [2021-08-21 17:35:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9818 states, 9817 states have (on average 1.7036772944891514) internal successors, (16725), 9817 states have internal predecessors, (16725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9818 states to 9818 states and 16725 transitions. [2021-08-21 17:35:48,540 INFO L78 Accepts]: Start accepts. Automaton has 9818 states and 16725 transitions. Word has length 38 [2021-08-21 17:35:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:48,540 INFO L470 AbstractCegarLoop]: Abstraction has 9818 states and 16725 transitions. [2021-08-21 17:35:48,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9818 states and 16725 transitions. [2021-08-21 17:35:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:48,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:48,549 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:48,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:48,764 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,SelfDestructingSolverStorable100 [2021-08-21 17:35:48,765 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1204026016, now seen corresponding path program 91 times [2021-08-21 17:35:48,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:48,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611355151] [2021-08-21 17:35:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:48,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:48,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:48,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611355151] [2021-08-21 17:35:48,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611355151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:48,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669708635] [2021-08-21 17:35:48,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:48,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:48,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:48,983 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 17:35:48,983 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 17:35:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:52,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669708635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:52,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:52,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:35:52,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231799959] [2021-08-21 17:35:52,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:35:52,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:35:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:35:52,283 INFO L87 Difference]: Start difference. First operand 9818 states and 16725 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:52,849 INFO L93 Difference]: Finished difference Result 10028 states and 17061 transitions. [2021-08-21 17:35:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:35:52,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:52,864 INFO L225 Difference]: With dead ends: 10028 [2021-08-21 17:35:52,864 INFO L226 Difference]: Without dead ends: 10016 [2021-08-21 17:35:52,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:35:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-08-21 17:35:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 9952. [2021-08-21 17:35:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9952 states, 9951 states have (on average 1.7048537835393427) internal successors, (16965), 9951 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 16965 transitions. [2021-08-21 17:35:52,988 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 16965 transitions. Word has length 38 [2021-08-21 17:35:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:52,988 INFO L470 AbstractCegarLoop]: Abstraction has 9952 states and 16965 transitions. [2021-08-21 17:35:52,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 16965 transitions. [2021-08-21 17:35:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:52,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:52,995 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:53,019 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 17:35:53,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:53,195 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash 20722976, now seen corresponding path program 92 times [2021-08-21 17:35:53,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:53,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412132334] [2021-08-21 17:35:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:53,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:53,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:53,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412132334] [2021-08-21 17:35:53,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412132334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:53,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583393432] [2021-08-21 17:35:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:53,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:53,430 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 17:35:53,431 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 17:35:56,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:56,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:35:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:56,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583393432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:56,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:56,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:35:56,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082349114] [2021-08-21 17:35:56,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:35:56,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:35:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:56,842 INFO L87 Difference]: Start difference. First operand 9952 states and 16965 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:57,446 INFO L93 Difference]: Finished difference Result 10683 states and 18110 transitions. [2021-08-21 17:35:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:35:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:35:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:57,462 INFO L225 Difference]: With dead ends: 10683 [2021-08-21 17:35:57,462 INFO L226 Difference]: Without dead ends: 10665 [2021-08-21 17:35:57,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:35:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10665 states. [2021-08-21 17:35:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10665 to 10134. [2021-08-21 17:35:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10134 states, 10133 states have (on average 1.7062074410342445) internal successors, (17289), 10133 states have internal predecessors, (17289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10134 states to 10134 states and 17289 transitions. [2021-08-21 17:35:57,626 INFO L78 Accepts]: Start accepts. Automaton has 10134 states and 17289 transitions. Word has length 38 [2021-08-21 17:35:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:57,626 INFO L470 AbstractCegarLoop]: Abstraction has 10134 states and 17289 transitions. [2021-08-21 17:35:57,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10134 states and 17289 transitions. [2021-08-21 17:35:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:35:57,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:57,634 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:57,668 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 17:35:57,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 17:35:57,861 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1602499108, now seen corresponding path program 93 times [2021-08-21 17:35:57,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:57,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416843867] [2021-08-21 17:35:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:57,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:58,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:58,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416843867] [2021-08-21 17:35:58,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416843867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:58,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191861579] [2021-08-21 17:35:58,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:58,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:58,077 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 17:35:58,077 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 17:36:00,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:36:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:36:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:01,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191861579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:01,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:01,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:36:01,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434566807] [2021-08-21 17:36:01,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:36:01,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:36:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:36:01,575 INFO L87 Difference]: Start difference. First operand 10134 states and 17289 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:02,607 INFO L93 Difference]: Finished difference Result 10747 states and 18227 transitions. [2021-08-21 17:36:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:36:02,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:36:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:02,621 INFO L225 Difference]: With dead ends: 10747 [2021-08-21 17:36:02,621 INFO L226 Difference]: Without dead ends: 10735 [2021-08-21 17:36:02,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:36:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-08-21 17:36:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 10114. [2021-08-21 17:36:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10114 states, 10113 states have (on average 1.7058241866903985) internal successors, (17251), 10113 states have internal predecessors, (17251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10114 states to 10114 states and 17251 transitions. [2021-08-21 17:36:02,742 INFO L78 Accepts]: Start accepts. Automaton has 10114 states and 17251 transitions. Word has length 38 [2021-08-21 17:36:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:02,742 INFO L470 AbstractCegarLoop]: Abstraction has 10114 states and 17251 transitions. [2021-08-21 17:36:02,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 10114 states and 17251 transitions. [2021-08-21 17:36:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:36:02,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:02,749 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:02,773 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 17:36:02,949 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,SelfDestructingSolverStorable103 [2021-08-21 17:36:02,949 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1700801876, now seen corresponding path program 94 times [2021-08-21 17:36:02,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:02,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517251363] [2021-08-21 17:36:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:02,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:03,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:03,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517251363] [2021-08-21 17:36:03,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517251363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:03,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849185079] [2021-08-21 17:36:03,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:03,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:03,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:03,169 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 17:36:03,170 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 17:36:06,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:36:06,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:36:06,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:06,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849185079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:06,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:06,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:36:06,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250447650] [2021-08-21 17:36:06,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:36:06,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:36:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:36:06,607 INFO L87 Difference]: Start difference. First operand 10114 states and 17251 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:07,093 INFO L93 Difference]: Finished difference Result 10187 states and 17356 transitions. [2021-08-21 17:36:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:36:07,094 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:36:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:07,108 INFO L225 Difference]: With dead ends: 10187 [2021-08-21 17:36:07,108 INFO L226 Difference]: Without dead ends: 10181 [2021-08-21 17:36:07,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:36:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10181 states. [2021-08-21 17:36:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10181 to 10140. [2021-08-21 17:36:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10140 states, 10139 states have (on average 1.7063812999309595) internal successors, (17301), 10139 states have internal predecessors, (17301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10140 states to 10140 states and 17301 transitions. [2021-08-21 17:36:07,232 INFO L78 Accepts]: Start accepts. Automaton has 10140 states and 17301 transitions. Word has length 38 [2021-08-21 17:36:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:07,232 INFO L470 AbstractCegarLoop]: Abstraction has 10140 states and 17301 transitions. [2021-08-21 17:36:07,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 10140 states and 17301 transitions. [2021-08-21 17:36:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:36:07,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:07,239 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:07,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 17:36:07,439 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,SelfDestructingSolverStorable104 [2021-08-21 17:36:07,440 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1642089828, now seen corresponding path program 95 times [2021-08-21 17:36:07,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:07,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006511489] [2021-08-21 17:36:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:07,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:07,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:07,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006511489] [2021-08-21 17:36:07,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006511489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:07,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752432573] [2021-08-21 17:36:07,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:07,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:07,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:07,659 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 17:36:07,660 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 17:36:10,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:36:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:10,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:36:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:11,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752432573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:11,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:11,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 17:36:11,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243965908] [2021-08-21 17:36:11,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:36:11,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:36:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:36:11,084 INFO L87 Difference]: Start difference. First operand 10140 states and 17301 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:11,558 INFO L93 Difference]: Finished difference Result 10218 states and 17416 transitions. [2021-08-21 17:36:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:36:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:36:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:11,572 INFO L225 Difference]: With dead ends: 10218 [2021-08-21 17:36:11,572 INFO L226 Difference]: Without dead ends: 10212 [2021-08-21 17:36:11,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:36:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10212 states. [2021-08-21 17:36:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10212 to 10166. [2021-08-21 17:36:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10166 states, 10165 states have (on average 1.706935563207083) internal successors, (17351), 10165 states have internal predecessors, (17351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10166 states to 10166 states and 17351 transitions. [2021-08-21 17:36:11,688 INFO L78 Accepts]: Start accepts. Automaton has 10166 states and 17351 transitions. Word has length 38 [2021-08-21 17:36:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:11,688 INFO L470 AbstractCegarLoop]: Abstraction has 10166 states and 17351 transitions. [2021-08-21 17:36:11,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 10166 states and 17351 transitions. [2021-08-21 17:36:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:36:11,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:11,694 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:11,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:11,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:11,895 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash -622705084, now seen corresponding path program 96 times [2021-08-21 17:36:11,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:11,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450286559] [2021-08-21 17:36:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:11,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:36:11,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:11,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450286559] [2021-08-21 17:36:11,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450286559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:11,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138466342] [2021-08-21 17:36:11,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:36:11,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:11,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:11,941 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 17:36:11,942 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 17:36:14,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:36:14,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:36:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:36:15,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138466342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:15,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:15,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:36:15,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604588030] [2021-08-21 17:36:15,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:36:15,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:36:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:36:15,009 INFO L87 Difference]: Start difference. First operand 10166 states and 17351 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 17:36:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:15,122 INFO L93 Difference]: Finished difference Result 10837 states and 18244 transitions. [2021-08-21 17:36:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:36:15,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 17:36:15,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:15,136 INFO L225 Difference]: With dead ends: 10837 [2021-08-21 17:36:15,136 INFO L226 Difference]: Without dead ends: 10827 [2021-08-21 17:36:15,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10827 states. [2021-08-21 17:36:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10827 to 10309. [2021-08-21 17:36:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 10308 states have (on average 1.7029491656965463) internal successors, (17554), 10308 states have internal predecessors, (17554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 17554 transitions. [2021-08-21 17:36:15,256 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 17554 transitions. Word has length 39 [2021-08-21 17:36:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:15,257 INFO L470 AbstractCegarLoop]: Abstraction has 10309 states and 17554 transitions. [2021-08-21 17:36:15,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 17:36:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 17554 transitions. [2021-08-21 17:36:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:36:15,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:15,264 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:15,287 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 17:36:15,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:15,464 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1311270660, now seen corresponding path program 97 times [2021-08-21 17:36:15,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:15,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431961328] [2021-08-21 17:36:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:15,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:36:15,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:15,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431961328] [2021-08-21 17:36:15,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431961328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:15,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113791607] [2021-08-21 17:36:15,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:15,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:15,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:15,506 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 17:36:15,507 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 17:36:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:36:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:36:18,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113791607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:18,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:18,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 17:36:18,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888719483] [2021-08-21 17:36:18,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:36:18,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:36:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:36:18,634 INFO L87 Difference]: Start difference. First operand 10309 states and 17554 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 17:36:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:18,714 INFO L93 Difference]: Finished difference Result 12892 states and 21871 transitions. [2021-08-21 17:36:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:36:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 17:36:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:18,731 INFO L225 Difference]: With dead ends: 12892 [2021-08-21 17:36:18,731 INFO L226 Difference]: Without dead ends: 12890 [2021-08-21 17:36:18,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:36:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-08-21 17:36:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 11152. [2021-08-21 17:36:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11152 states, 11151 states have (on average 1.707559860102233) internal successors, (19041), 11151 states have internal predecessors, (19041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11152 states to 11152 states and 19041 transitions. [2021-08-21 17:36:18,867 INFO L78 Accepts]: Start accepts. Automaton has 11152 states and 19041 transitions. Word has length 39 [2021-08-21 17:36:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:18,867 INFO L470 AbstractCegarLoop]: Abstraction has 11152 states and 19041 transitions. [2021-08-21 17:36:18,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 17:36:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11152 states and 19041 transitions. [2021-08-21 17:36:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:36:18,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:18,875 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:18,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 17:36:19,077 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,SelfDestructingSolverStorable107 [2021-08-21 17:36:19,077 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash -517176690, now seen corresponding path program 98 times [2021-08-21 17:36:19,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:19,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001520363] [2021-08-21 17:36:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:19,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:36:19,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:19,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001520363] [2021-08-21 17:36:19,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001520363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:19,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293386737] [2021-08-21 17:36:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:36:19,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:19,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:19,133 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 17:36:19,133 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 17:36:22,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:36:22,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:22,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:36:22,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:36:22,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293386737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:22,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:22,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-08-21 17:36:22,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541522921] [2021-08-21 17:36:22,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:36:22,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:36:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:36:22,249 INFO L87 Difference]: Start difference. First operand 11152 states and 19041 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:22,345 INFO L93 Difference]: Finished difference Result 12417 states and 20790 transitions. [2021-08-21 17:36:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:36:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 17:36:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:22,363 INFO L225 Difference]: With dead ends: 12417 [2021-08-21 17:36:22,363 INFO L226 Difference]: Without dead ends: 12417 [2021-08-21 17:36:22,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:36:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12417 states. [2021-08-21 17:36:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12417 to 11670. [2021-08-21 17:36:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11670 states, 11669 states have (on average 1.7063158796812066) internal successors, (19911), 11669 states have internal predecessors, (19911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11670 states to 11670 states and 19911 transitions. [2021-08-21 17:36:22,502 INFO L78 Accepts]: Start accepts. Automaton has 11670 states and 19911 transitions. Word has length 39 [2021-08-21 17:36:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:22,502 INFO L470 AbstractCegarLoop]: Abstraction has 11670 states and 19911 transitions. [2021-08-21 17:36:22,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 11670 states and 19911 transitions. [2021-08-21 17:36:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:36:22,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:22,510 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:22,533 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 17:36:22,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:22,710 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1785341884, now seen corresponding path program 99 times [2021-08-21 17:36:22,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:22,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309491076] [2021-08-21 17:36:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:22,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:36:22,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:22,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309491076] [2021-08-21 17:36:22,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309491076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:22,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419787318] [2021-08-21 17:36:22,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:36:22,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:22,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:22,769 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 17:36:22,770 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 17:36:25,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:36:25,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:36:25,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:36:25,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419787318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:25,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:25,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-08-21 17:36:25,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115418121] [2021-08-21 17:36:25,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:36:25,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:25,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:36:25,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:36:25,934 INFO L87 Difference]: Start difference. First operand 11670 states and 19911 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:26,086 INFO L93 Difference]: Finished difference Result 12461 states and 20818 transitions. [2021-08-21 17:36:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:36:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 17:36:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:26,105 INFO L225 Difference]: With dead ends: 12461 [2021-08-21 17:36:26,105 INFO L226 Difference]: Without dead ends: 12459 [2021-08-21 17:36:26,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:36:26,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12459 states. [2021-08-21 17:36:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12459 to 11400. [2021-08-21 17:36:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11400 states, 11399 states have (on average 1.6946223352925696) internal successors, (19317), 11399 states have internal predecessors, (19317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11400 states to 11400 states and 19317 transitions. [2021-08-21 17:36:26,243 INFO L78 Accepts]: Start accepts. Automaton has 11400 states and 19317 transitions. Word has length 39 [2021-08-21 17:36:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:26,244 INFO L470 AbstractCegarLoop]: Abstraction has 11400 states and 19317 transitions. [2021-08-21 17:36:26,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 11400 states and 19317 transitions. [2021-08-21 17:36:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 17:36:26,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:26,251 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:26,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 17:36:26,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:26,452 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1374418380, now seen corresponding path program 8 times [2021-08-21 17:36:26,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:26,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6426080] [2021-08-21 17:36:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:26,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-21 17:36:26,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:26,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6426080] [2021-08-21 17:36:26,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6426080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:26,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55859841] [2021-08-21 17:36:26,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:36:26,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:26,600 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 17:36:26,601 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 17:36:29,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:36:29,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:36:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-21 17:36:29,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55859841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:29,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:29,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:36:29,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869986673] [2021-08-21 17:36:29,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:29,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:29,868 INFO L87 Difference]: Start difference. First operand 11400 states and 19317 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:30,272 INFO L93 Difference]: Finished difference Result 11499 states and 19457 transitions. [2021-08-21 17:36:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:36:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 17:36:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:30,288 INFO L225 Difference]: With dead ends: 11499 [2021-08-21 17:36:30,288 INFO L226 Difference]: Without dead ends: 11416 [2021-08-21 17:36:30,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:36:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2021-08-21 17:36:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 11409. [2021-08-21 17:36:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 1.6943373071528751) internal successors, (19329), 11408 states have internal predecessors, (19329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 19329 transitions. [2021-08-21 17:36:30,430 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 19329 transitions. Word has length 40 [2021-08-21 17:36:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:30,430 INFO L470 AbstractCegarLoop]: Abstraction has 11409 states and 19329 transitions. [2021-08-21 17:36:30,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 19329 transitions. [2021-08-21 17:36:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 17:36:30,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:30,438 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:30,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 17:36:30,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:30,639 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1225041440, now seen corresponding path program 100 times [2021-08-21 17:36:30,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:30,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807455408] [2021-08-21 17:36:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:30,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:36:30,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:30,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807455408] [2021-08-21 17:36:30,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807455408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:30,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905804336] [2021-08-21 17:36:30,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:30,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:30,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:30,721 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 17:36:30,722 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 17:36:33,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:36:33,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:33,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:36:33,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:36:33,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905804336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:33,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:33,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 17:36:33,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456361486] [2021-08-21 17:36:33,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:36:33,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:36:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:36:33,942 INFO L87 Difference]: Start difference. First operand 11409 states and 19329 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:34,160 INFO L93 Difference]: Finished difference Result 12657 states and 20989 transitions. [2021-08-21 17:36:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:36:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 17:36:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:34,178 INFO L225 Difference]: With dead ends: 12657 [2021-08-21 17:36:34,178 INFO L226 Difference]: Without dead ends: 12657 [2021-08-21 17:36:34,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:36:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-08-21 17:36:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 9765. [2021-08-21 17:36:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9765 states, 9764 states have (on average 1.6526013928717738) internal successors, (16136), 9764 states have internal predecessors, (16136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9765 states to 9765 states and 16136 transitions. [2021-08-21 17:36:34,344 INFO L78 Accepts]: Start accepts. Automaton has 9765 states and 16136 transitions. Word has length 41 [2021-08-21 17:36:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:34,344 INFO L470 AbstractCegarLoop]: Abstraction has 9765 states and 16136 transitions. [2021-08-21 17:36:34,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 9765 states and 16136 transitions. [2021-08-21 17:36:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 17:36:34,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:34,352 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:34,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 17:36:34,553 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,SelfDestructingSolverStorable111 [2021-08-21 17:36:34,553 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1009055464, now seen corresponding path program 101 times [2021-08-21 17:36:34,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:34,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261965465] [2021-08-21 17:36:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:34,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:36:34,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:34,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261965465] [2021-08-21 17:36:34,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261965465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:34,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561877906] [2021-08-21 17:36:34,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:34,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:34,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:34,629 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 17:36:34,630 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 17:36:37,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:36:37,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:37,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:36:37,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:36:37,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561877906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:37,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:37,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 17:36:37,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995755032] [2021-08-21 17:36:37,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:36:37,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:36:37,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:36:37,840 INFO L87 Difference]: Start difference. First operand 9765 states and 16136 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:38,069 INFO L93 Difference]: Finished difference Result 10278 states and 16497 transitions. [2021-08-21 17:36:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:36:38,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 17:36:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:38,083 INFO L225 Difference]: With dead ends: 10278 [2021-08-21 17:36:38,083 INFO L226 Difference]: Without dead ends: 10278 [2021-08-21 17:36:38,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:36:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-08-21 17:36:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 9543. [2021-08-21 17:36:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9543 states, 9542 states have (on average 1.6136030182351708) internal successors, (15397), 9542 states have internal predecessors, (15397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9543 states to 9543 states and 15397 transitions. [2021-08-21 17:36:38,252 INFO L78 Accepts]: Start accepts. Automaton has 9543 states and 15397 transitions. Word has length 41 [2021-08-21 17:36:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:38,252 INFO L470 AbstractCegarLoop]: Abstraction has 9543 states and 15397 transitions. [2021-08-21 17:36:38,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9543 states and 15397 transitions. [2021-08-21 17:36:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:36:38,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:38,259 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:38,283 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 17:36:38,459 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,SelfDestructingSolverStorable112 [2021-08-21 17:36:38,459 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash 713098411, now seen corresponding path program 102 times [2021-08-21 17:36:38,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:38,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654886024] [2021-08-21 17:36:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:38,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:38,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:38,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654886024] [2021-08-21 17:36:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654886024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:38,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624198301] [2021-08-21 17:36:38,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:36:38,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:38,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:38,645 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 17:36:38,646 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 17:36:41,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:36:41,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:41,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:36:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:36:42,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624198301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:42,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:42,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-21 17:36:42,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346711391] [2021-08-21 17:36:42,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:36:42,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:36:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:36:42,321 INFO L87 Difference]: Start difference. First operand 9543 states and 15397 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:42,731 INFO L93 Difference]: Finished difference Result 10550 states and 16880 transitions. [2021-08-21 17:36:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:36:42,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:36:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:42,746 INFO L225 Difference]: With dead ends: 10550 [2021-08-21 17:36:42,746 INFO L226 Difference]: Without dead ends: 10528 [2021-08-21 17:36:42,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:36:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-08-21 17:36:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 10219. [2021-08-21 17:36:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10219 states, 10218 states have (on average 1.6105891563906831) internal successors, (16457), 10218 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10219 states to 10219 states and 16457 transitions. [2021-08-21 17:36:42,859 INFO L78 Accepts]: Start accepts. Automaton has 10219 states and 16457 transitions. Word has length 42 [2021-08-21 17:36:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:42,860 INFO L470 AbstractCegarLoop]: Abstraction has 10219 states and 16457 transitions. [2021-08-21 17:36:42,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10219 states and 16457 transitions. [2021-08-21 17:36:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:36:42,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:42,868 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:42,893 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 17:36:43,068 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,SelfDestructingSolverStorable113 [2021-08-21 17:36:43,069 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:43,069 INFO L82 PathProgramCache]: Analyzing trace with hash -701402441, now seen corresponding path program 103 times [2021-08-21 17:36:43,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:43,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917090683] [2021-08-21 17:36:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:43,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:43,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:43,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917090683] [2021-08-21 17:36:43,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917090683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:43,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823587620] [2021-08-21 17:36:43,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:43,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:43,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:43,260 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 17:36:43,271 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 17:36:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:46,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:36:46,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:46,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823587620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:46,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:46,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 17:36:46,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821308474] [2021-08-21 17:36:46,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:36:46,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:36:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:36:46,939 INFO L87 Difference]: Start difference. First operand 10219 states and 16457 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:47,353 INFO L93 Difference]: Finished difference Result 11676 states and 18639 transitions. [2021-08-21 17:36:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:36:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:36:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:47,368 INFO L225 Difference]: With dead ends: 11676 [2021-08-21 17:36:47,368 INFO L226 Difference]: Without dead ends: 11648 [2021-08-21 17:36:47,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:36:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11648 states. [2021-08-21 17:36:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11648 to 10737. [2021-08-21 17:36:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10737 states, 10736 states have (on average 1.60897913561848) internal successors, (17274), 10736 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10737 states to 10737 states and 17274 transitions. [2021-08-21 17:36:47,497 INFO L78 Accepts]: Start accepts. Automaton has 10737 states and 17274 transitions. Word has length 42 [2021-08-21 17:36:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:47,497 INFO L470 AbstractCegarLoop]: Abstraction has 10737 states and 17274 transitions. [2021-08-21 17:36:47,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10737 states and 17274 transitions. [2021-08-21 17:36:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:36:47,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:47,506 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:47,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 17:36:47,706 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,SelfDestructingSolverStorable114 [2021-08-21 17:36:47,706 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:47,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1146576683, now seen corresponding path program 104 times [2021-08-21 17:36:47,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:47,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094987023] [2021-08-21 17:36:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:47,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:47,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:47,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094987023] [2021-08-21 17:36:47,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094987023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:47,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114106026] [2021-08-21 17:36:47,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:36:47,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:47,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:47,892 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 17:36:47,893 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 17:36:51,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:36:51,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:36:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:36:51,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114106026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:51,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:51,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 17:36:51,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124521384] [2021-08-21 17:36:51,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:36:51,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:36:51,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:36:51,577 INFO L87 Difference]: Start difference. First operand 10737 states and 17274 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:52,040 INFO L93 Difference]: Finished difference Result 11562 states and 18468 transitions. [2021-08-21 17:36:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:36:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:36:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:52,055 INFO L225 Difference]: With dead ends: 11562 [2021-08-21 17:36:52,055 INFO L226 Difference]: Without dead ends: 11550 [2021-08-21 17:36:52,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:36:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-08-21 17:36:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11185. [2021-08-21 17:36:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11185 states, 11184 states have (on average 1.6073855507868384) internal successors, (17977), 11184 states have internal predecessors, (17977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11185 states to 11185 states and 17977 transitions. [2021-08-21 17:36:52,182 INFO L78 Accepts]: Start accepts. Automaton has 11185 states and 17977 transitions. Word has length 42 [2021-08-21 17:36:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:52,182 INFO L470 AbstractCegarLoop]: Abstraction has 11185 states and 17977 transitions. [2021-08-21 17:36:52,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 11185 states and 17977 transitions. [2021-08-21 17:36:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:36:52,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:52,193 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:52,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 17:36:52,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:52,409 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash 972572727, now seen corresponding path program 105 times [2021-08-21 17:36:52,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:52,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528112617] [2021-08-21 17:36:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:52,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:52,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:52,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528112617] [2021-08-21 17:36:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528112617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:52,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244204585] [2021-08-21 17:36:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:36:52,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:52,765 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 17:36:52,766 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 17:36:56,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:36:56,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:36:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:36:56,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244204585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:56,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:56,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:36:56,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389528757] [2021-08-21 17:36:56,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:36:56,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:36:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:36:56,536 INFO L87 Difference]: Start difference. First operand 11185 states and 17977 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:58,078 INFO L93 Difference]: Finished difference Result 11655 states and 18647 transitions. [2021-08-21 17:36:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:36:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:36:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:58,092 INFO L225 Difference]: With dead ends: 11655 [2021-08-21 17:36:58,092 INFO L226 Difference]: Without dead ends: 11651 [2021-08-21 17:36:58,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:36:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11651 states. [2021-08-21 17:36:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11651 to 11463. [2021-08-21 17:36:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11463 states, 11462 states have (on average 1.6075728494154597) internal successors, (18426), 11462 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11463 states to 11463 states and 18426 transitions. [2021-08-21 17:36:58,216 INFO L78 Accepts]: Start accepts. Automaton has 11463 states and 18426 transitions. Word has length 42 [2021-08-21 17:36:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:58,216 INFO L470 AbstractCegarLoop]: Abstraction has 11463 states and 18426 transitions. [2021-08-21 17:36:58,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11463 states and 18426 transitions. [2021-08-21 17:36:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:36:58,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:58,225 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:58,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:58,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:58,426 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:58,426 INFO L82 PathProgramCache]: Analyzing trace with hash 126874149, now seen corresponding path program 106 times [2021-08-21 17:36:58,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:58,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244872538] [2021-08-21 17:36:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:58,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:58,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:58,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244872538] [2021-08-21 17:36:58,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244872538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:58,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105246174] [2021-08-21 17:36:58,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:58,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:58,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:58,825 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 17:36:58,825 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 17:37:02,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:37:02,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:37:02,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105246174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:02,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:02,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:02,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273581378] [2021-08-21 17:37:02,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:02,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:02,624 INFO L87 Difference]: Start difference. First operand 11463 states and 18426 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:04,303 INFO L93 Difference]: Finished difference Result 11745 states and 18819 transitions. [2021-08-21 17:37:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:37:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:04,317 INFO L225 Difference]: With dead ends: 11745 [2021-08-21 17:37:04,317 INFO L226 Difference]: Without dead ends: 11741 [2021-08-21 17:37:04,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1289.9ms TimeCoverageRelationStatistics Valid=271, Invalid=2485, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:37:04,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-08-21 17:37:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11493. [2021-08-21 17:37:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11493 states, 11492 states have (on average 1.6072920292377306) internal successors, (18471), 11492 states have internal predecessors, (18471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11493 states to 11493 states and 18471 transitions. [2021-08-21 17:37:04,447 INFO L78 Accepts]: Start accepts. Automaton has 11493 states and 18471 transitions. Word has length 42 [2021-08-21 17:37:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:04,447 INFO L470 AbstractCegarLoop]: Abstraction has 11493 states and 18471 transitions. [2021-08-21 17:37:04,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 11493 states and 18471 transitions. [2021-08-21 17:37:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:04,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:04,456 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:04,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 17:37:04,657 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,SelfDestructingSolverStorable117 [2021-08-21 17:37:04,657 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1709679923, now seen corresponding path program 107 times [2021-08-21 17:37:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:04,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140130772] [2021-08-21 17:37:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:04,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:05,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:05,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140130772] [2021-08-21 17:37:05,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140130772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:05,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225195376] [2021-08-21 17:37:05,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:37:05,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:05,070 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 17:37:05,070 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 17:37:08,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:37:08,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:37:08,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225195376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:08,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:08,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:08,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92639296] [2021-08-21 17:37:08,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:08,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:08,946 INFO L87 Difference]: Start difference. First operand 11493 states and 18471 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:10,318 INFO L93 Difference]: Finished difference Result 11977 states and 19177 transitions. [2021-08-21 17:37:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:37:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:10,334 INFO L225 Difference]: With dead ends: 11977 [2021-08-21 17:37:10,335 INFO L226 Difference]: Without dead ends: 11971 [2021-08-21 17:37:10,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1226.1ms TimeCoverageRelationStatistics Valid=320, Invalid=2436, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:37:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11971 states. [2021-08-21 17:37:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11971 to 11761. [2021-08-21 17:37:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11761 states, 11760 states have (on average 1.6054421768707483) internal successors, (18880), 11760 states have internal predecessors, (18880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 18880 transitions. [2021-08-21 17:37:10,474 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 18880 transitions. Word has length 42 [2021-08-21 17:37:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:10,474 INFO L470 AbstractCegarLoop]: Abstraction has 11761 states and 18880 transitions. [2021-08-21 17:37:10,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 18880 transitions. [2021-08-21 17:37:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:10,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:10,484 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:10,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 17:37:10,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:10,685 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 477177317, now seen corresponding path program 108 times [2021-08-21 17:37:10,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:10,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363896817] [2021-08-21 17:37:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:10,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:11,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:11,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363896817] [2021-08-21 17:37:11,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363896817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:11,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238552029] [2021-08-21 17:37:11,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:37:11,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:11,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:11,073 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 17:37:11,073 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 17:37:14,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:37:14,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:37:15,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238552029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:15,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:15,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:15,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510475321] [2021-08-21 17:37:15,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:15,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:15,045 INFO L87 Difference]: Start difference. First operand 11761 states and 18880 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:16,357 INFO L93 Difference]: Finished difference Result 12322 states and 19676 transitions. [2021-08-21 17:37:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:37:16,358 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:16,375 INFO L225 Difference]: With dead ends: 12322 [2021-08-21 17:37:16,376 INFO L226 Difference]: Without dead ends: 12310 [2021-08-21 17:37:16,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 989.2ms TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:37:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12310 states. [2021-08-21 17:37:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12310 to 11896. [2021-08-21 17:37:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11896 states, 11895 states have (on average 1.6042034468263977) internal successors, (19082), 11895 states have internal predecessors, (19082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11896 states to 11896 states and 19082 transitions. [2021-08-21 17:37:16,525 INFO L78 Accepts]: Start accepts. Automaton has 11896 states and 19082 transitions. Word has length 42 [2021-08-21 17:37:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:16,526 INFO L470 AbstractCegarLoop]: Abstraction has 11896 states and 19082 transitions. [2021-08-21 17:37:16,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand 11896 states and 19082 transitions. [2021-08-21 17:37:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:16,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:16,535 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:16,562 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 17:37:16,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:16,736 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash -641449921, now seen corresponding path program 109 times [2021-08-21 17:37:16,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:16,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555301856] [2021-08-21 17:37:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:16,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:17,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:17,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555301856] [2021-08-21 17:37:17,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555301856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:17,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421134215] [2021-08-21 17:37:17,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:37:17,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:17,156 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 17:37:17,156 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 17:37:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:37:21,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421134215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:21,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:21,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:21,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984583166] [2021-08-21 17:37:21,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:21,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:21,132 INFO L87 Difference]: Start difference. First operand 11896 states and 19082 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:22,603 INFO L93 Difference]: Finished difference Result 12082 states and 19335 transitions. [2021-08-21 17:37:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:37:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:22,617 INFO L225 Difference]: With dead ends: 12082 [2021-08-21 17:37:22,617 INFO L226 Difference]: Without dead ends: 12078 [2021-08-21 17:37:22,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1305.5ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:37:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12078 states. [2021-08-21 17:37:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12078 to 11966. [2021-08-21 17:37:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11966 states, 11965 states have (on average 1.6036773923944838) internal successors, (19188), 11965 states have internal predecessors, (19188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11966 states to 11966 states and 19188 transitions. [2021-08-21 17:37:22,749 INFO L78 Accepts]: Start accepts. Automaton has 11966 states and 19188 transitions. Word has length 42 [2021-08-21 17:37:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:22,749 INFO L470 AbstractCegarLoop]: Abstraction has 11966 states and 19188 transitions. [2021-08-21 17:37:22,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 11966 states and 19188 transitions. [2021-08-21 17:37:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:22,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:22,759 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:22,784 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 17:37:22,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:22,959 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash 210221217, now seen corresponding path program 110 times [2021-08-21 17:37:22,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:22,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241295846] [2021-08-21 17:37:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:22,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:23,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:23,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241295846] [2021-08-21 17:37:23,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241295846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:23,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875473930] [2021-08-21 17:37:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:37:23,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:23,378 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 17:37:23,378 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 17:37:26,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:37:26,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:37:27,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875473930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:27,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:27,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:27,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809809633] [2021-08-21 17:37:27,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:27,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:27,345 INFO L87 Difference]: Start difference. First operand 11966 states and 19188 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:28,918 INFO L93 Difference]: Finished difference Result 12232 states and 19562 transitions. [2021-08-21 17:37:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:37:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:28,935 INFO L225 Difference]: With dead ends: 12232 [2021-08-21 17:37:28,936 INFO L226 Difference]: Without dead ends: 12226 [2021-08-21 17:37:28,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1358.7ms TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:37:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-08-21 17:37:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 12034. [2021-08-21 17:37:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 12033 states have (on average 1.6032577079697499) internal successors, (19292), 12033 states have internal predecessors, (19292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 19292 transitions. [2021-08-21 17:37:29,129 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 19292 transitions. Word has length 42 [2021-08-21 17:37:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:29,129 INFO L470 AbstractCegarLoop]: Abstraction has 12034 states and 19292 transitions. [2021-08-21 17:37:29,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 19292 transitions. [2021-08-21 17:37:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:29,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:29,138 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:29,166 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 17:37:29,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:29,341 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1793026991, now seen corresponding path program 111 times [2021-08-21 17:37:29,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:29,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737930091] [2021-08-21 17:37:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:29,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:29,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:29,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737930091] [2021-08-21 17:37:29,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737930091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:29,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151548962] [2021-08-21 17:37:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:37:29,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:29,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:29,689 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 17:37:29,689 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 17:37:33,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:37:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:33,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:33,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151548962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:33,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:33,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-08-21 17:37:33,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533285410] [2021-08-21 17:37:33,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:37:33,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:37:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:37:33,910 INFO L87 Difference]: Start difference. First operand 12034 states and 19292 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:36,047 INFO L93 Difference]: Finished difference Result 12836 states and 20456 transitions. [2021-08-21 17:37:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:37:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:36,067 INFO L225 Difference]: With dead ends: 12836 [2021-08-21 17:37:36,067 INFO L226 Difference]: Without dead ends: 12830 [2021-08-21 17:37:36,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1446.3ms TimeCoverageRelationStatistics Valid=344, Invalid=3562, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 17:37:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12830 states. [2021-08-21 17:37:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12830 to 12398. [2021-08-21 17:37:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12398 states, 12397 states have (on average 1.603291118819069) internal successors, (19876), 12397 states have internal predecessors, (19876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12398 states to 12398 states and 19876 transitions. [2021-08-21 17:37:36,222 INFO L78 Accepts]: Start accepts. Automaton has 12398 states and 19876 transitions. Word has length 42 [2021-08-21 17:37:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:36,222 INFO L470 AbstractCegarLoop]: Abstraction has 12398 states and 19876 transitions. [2021-08-21 17:37:36,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 12398 states and 19876 transitions. [2021-08-21 17:37:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:36,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:36,232 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:36,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 17:37:36,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 17:37:36,432 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:36,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:36,432 INFO L82 PathProgramCache]: Analyzing trace with hash 560524385, now seen corresponding path program 112 times [2021-08-21 17:37:36,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:36,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209336673] [2021-08-21 17:37:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:36,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:36,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:36,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209336673] [2021-08-21 17:37:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209336673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:36,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536112495] [2021-08-21 17:37:36,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:37:36,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:36,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:36,856 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 17:37:36,857 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 17:37:40,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:37:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:37:40,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536112495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:40,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:40,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:40,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538926389] [2021-08-21 17:37:40,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:40,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:40,995 INFO L87 Difference]: Start difference. First operand 12398 states and 19876 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:42,294 INFO L93 Difference]: Finished difference Result 12989 states and 20729 transitions. [2021-08-21 17:37:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:37:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:42,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:42,314 INFO L225 Difference]: With dead ends: 12989 [2021-08-21 17:37:42,314 INFO L226 Difference]: Without dead ends: 12977 [2021-08-21 17:37:42,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1070.9ms TimeCoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:37:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12977 states. [2021-08-21 17:37:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12977 to 12724. [2021-08-21 17:37:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12724 states, 12723 states have (on average 1.602216458382457) internal successors, (20385), 12723 states have internal predecessors, (20385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12724 states to 12724 states and 20385 transitions. [2021-08-21 17:37:42,472 INFO L78 Accepts]: Start accepts. Automaton has 12724 states and 20385 transitions. Word has length 42 [2021-08-21 17:37:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:42,472 INFO L470 AbstractCegarLoop]: Abstraction has 12724 states and 20385 transitions. [2021-08-21 17:37:42,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 12724 states and 20385 transitions. [2021-08-21 17:37:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:42,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:42,482 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:42,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 17:37:42,683 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,SelfDestructingSolverStorable123 [2021-08-21 17:37:42,683 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash -558102853, now seen corresponding path program 113 times [2021-08-21 17:37:42,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:42,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491089673] [2021-08-21 17:37:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:42,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:43,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:43,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491089673] [2021-08-21 17:37:43,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491089673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:43,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911678115] [2021-08-21 17:37:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:37:43,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:43,048 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 17:37:43,048 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 17:37:46,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:37:46,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:47,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911678115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:47,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:47,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:47,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593232825] [2021-08-21 17:37:47,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:47,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:47,199 INFO L87 Difference]: Start difference. First operand 12724 states and 20385 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:48,781 INFO L93 Difference]: Finished difference Result 13704 states and 21855 transitions. [2021-08-21 17:37:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:37:48,781 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:48,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:48,801 INFO L225 Difference]: With dead ends: 13704 [2021-08-21 17:37:48,802 INFO L226 Difference]: Without dead ends: 13698 [2021-08-21 17:37:48,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1090.1ms TimeCoverageRelationStatistics Valid=223, Invalid=2327, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 17:37:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2021-08-21 17:37:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 13514. [2021-08-21 17:37:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13514 states, 13513 states have (on average 1.5988307555687116) internal successors, (21605), 13513 states have internal predecessors, (21605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13514 states to 13514 states and 21605 transitions. [2021-08-21 17:37:48,982 INFO L78 Accepts]: Start accepts. Automaton has 13514 states and 21605 transitions. Word has length 42 [2021-08-21 17:37:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:48,982 INFO L470 AbstractCegarLoop]: Abstraction has 13514 states and 21605 transitions. [2021-08-21 17:37:48,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 13514 states and 21605 transitions. [2021-08-21 17:37:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:48,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:48,993 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:49,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 17:37:49,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:49,193 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 198695287, now seen corresponding path program 114 times [2021-08-21 17:37:49,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:49,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573352307] [2021-08-21 17:37:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:49,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:49,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:49,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573352307] [2021-08-21 17:37:49,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573352307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:49,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462630903] [2021-08-21 17:37:49,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:37:49,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:49,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:49,535 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 17:37:49,536 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 17:37:53,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:37:53,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:53,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:53,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462630903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:53,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:53,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:37:53,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346012251] [2021-08-21 17:37:53,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:37:53,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:37:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:37:53,688 INFO L87 Difference]: Start difference. First operand 13514 states and 21605 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:55,334 INFO L93 Difference]: Finished difference Result 13835 states and 22059 transitions. [2021-08-21 17:37:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:37:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:37:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:55,354 INFO L225 Difference]: With dead ends: 13835 [2021-08-21 17:37:55,354 INFO L226 Difference]: Without dead ends: 13829 [2021-08-21 17:37:55,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1093.6ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:37:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13829 states. [2021-08-21 17:37:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13829 to 13653. [2021-08-21 17:37:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13653 states, 13652 states have (on average 1.5981541166129505) internal successors, (21818), 13652 states have internal predecessors, (21818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13653 states to 13653 states and 21818 transitions. [2021-08-21 17:37:55,533 INFO L78 Accepts]: Start accepts. Automaton has 13653 states and 21818 transitions. Word has length 42 [2021-08-21 17:37:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:55,534 INFO L470 AbstractCegarLoop]: Abstraction has 13653 states and 21818 transitions. [2021-08-21 17:37:55,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 13653 states and 21818 transitions. [2021-08-21 17:37:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:37:55,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:55,544 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:55,570 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 17:37:55,745 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,SelfDestructingSolverStorable125 [2021-08-21 17:37:55,745 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:55,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1533704239, now seen corresponding path program 115 times [2021-08-21 17:37:55,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:55,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424961554] [2021-08-21 17:37:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:55,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:56,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:56,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424961554] [2021-08-21 17:37:56,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424961554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:56,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206521637] [2021-08-21 17:37:56,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:37:56,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:56,105 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 17:37:56,106 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 17:37:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:37:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:00,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206521637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:00,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:00,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:38:00,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336468630] [2021-08-21 17:38:00,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:38:00,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:38:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:38:00,360 INFO L87 Difference]: Start difference. First operand 13653 states and 21818 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:02,383 INFO L93 Difference]: Finished difference Result 14298 states and 22750 transitions. [2021-08-21 17:38:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 17:38:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:02,405 INFO L225 Difference]: With dead ends: 14298 [2021-08-21 17:38:02,406 INFO L226 Difference]: Without dead ends: 14286 [2021-08-21 17:38:02,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1580.7ms TimeCoverageRelationStatistics Valid=473, Invalid=3309, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:38:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14286 states. [2021-08-21 17:38:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14286 to 13974. [2021-08-21 17:38:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13974 states, 13973 states have (on average 1.5970800830172476) internal successors, (22316), 13973 states have internal predecessors, (22316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13974 states to 13974 states and 22316 transitions. [2021-08-21 17:38:02,631 INFO L78 Accepts]: Start accepts. Automaton has 13974 states and 22316 transitions. Word has length 42 [2021-08-21 17:38:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:02,631 INFO L470 AbstractCegarLoop]: Abstraction has 13974 states and 22316 transitions. [2021-08-21 17:38:02,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13974 states and 22316 transitions. [2021-08-21 17:38:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:02,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:02,641 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:02,666 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 17:38:02,842 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,SelfDestructingSolverStorable126 [2021-08-21 17:38:02,843 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash 548998455, now seen corresponding path program 116 times [2021-08-21 17:38:02,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:02,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325447874] [2021-08-21 17:38:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:02,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:03,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:03,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325447874] [2021-08-21 17:38:03,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325447874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:03,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866518798] [2021-08-21 17:38:03,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:38:03,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:03,187 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 17:38:03,188 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 17:38:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:38:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:07,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866518798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:07,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:07,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:38:07,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662825192] [2021-08-21 17:38:07,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:38:07,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:38:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:38:07,536 INFO L87 Difference]: Start difference. First operand 13974 states and 22316 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:09,303 INFO L93 Difference]: Finished difference Result 14826 states and 23542 transitions. [2021-08-21 17:38:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:38:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:09,324 INFO L225 Difference]: With dead ends: 14826 [2021-08-21 17:38:09,324 INFO L226 Difference]: Without dead ends: 14796 [2021-08-21 17:38:09,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1289.9ms TimeCoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:38:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14796 states. [2021-08-21 17:38:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14796 to 13717. [2021-08-21 17:38:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13717 states, 13716 states have (on average 1.5982064741907263) internal successors, (21921), 13716 states have internal predecessors, (21921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 21921 transitions. [2021-08-21 17:38:09,494 INFO L78 Accepts]: Start accepts. Automaton has 13717 states and 21921 transitions. Word has length 42 [2021-08-21 17:38:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:09,495 INFO L470 AbstractCegarLoop]: Abstraction has 13717 states and 21921 transitions. [2021-08-21 17:38:09,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 13717 states and 21921 transitions. [2021-08-21 17:38:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:09,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:09,505 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:09,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:09,708 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,SelfDestructingSolverStorable127 [2021-08-21 17:38:09,708 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash -339852937, now seen corresponding path program 117 times [2021-08-21 17:38:09,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:09,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868256919] [2021-08-21 17:38:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:09,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:09,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:09,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868256919] [2021-08-21 17:38:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868256919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:09,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769101927] [2021-08-21 17:38:09,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:38:09,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:09,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:09,944 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 17:38:09,945 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 17:38:13,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:38:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:14,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769101927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:14,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:14,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 17:38:14,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99096586] [2021-08-21 17:38:14,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:38:14,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:14,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:38:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:38:14,171 INFO L87 Difference]: Start difference. First operand 13717 states and 21921 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:14,928 INFO L93 Difference]: Finished difference Result 14654 states and 23283 transitions. [2021-08-21 17:38:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:38:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:14,951 INFO L225 Difference]: With dead ends: 14654 [2021-08-21 17:38:14,951 INFO L226 Difference]: Without dead ends: 14630 [2021-08-21 17:38:14,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:38:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14630 states. [2021-08-21 17:38:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14630 to 14241. [2021-08-21 17:38:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14241 states, 14240 states have (on average 1.5997893258426967) internal successors, (22781), 14240 states have internal predecessors, (22781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14241 states to 14241 states and 22781 transitions. [2021-08-21 17:38:15,145 INFO L78 Accepts]: Start accepts. Automaton has 14241 states and 22781 transitions. Word has length 42 [2021-08-21 17:38:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:15,145 INFO L470 AbstractCegarLoop]: Abstraction has 14241 states and 22781 transitions. [2021-08-21 17:38:15,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 14241 states and 22781 transitions. [2021-08-21 17:38:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:15,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:15,156 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:15,183 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 17:38:15,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 17:38:15,357 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash 272055253, now seen corresponding path program 118 times [2021-08-21 17:38:15,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:15,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308486007] [2021-08-21 17:38:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:15,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:15,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:15,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308486007] [2021-08-21 17:38:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308486007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:15,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148102866] [2021-08-21 17:38:15,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:38:15,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:15,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:15,782 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 17:38:15,783 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 17:38:19,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:38:19,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:19,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148102866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:20,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:20,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:38:20,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467101402] [2021-08-21 17:38:20,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:38:20,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:38:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:38:20,114 INFO L87 Difference]: Start difference. First operand 14241 states and 22781 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:21,430 INFO L93 Difference]: Finished difference Result 14680 states and 23426 transitions. [2021-08-21 17:38:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:38:21,430 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:21,453 INFO L225 Difference]: With dead ends: 14680 [2021-08-21 17:38:21,453 INFO L226 Difference]: Without dead ends: 14674 [2021-08-21 17:38:21,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1206.8ms TimeCoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 17:38:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14674 states. [2021-08-21 17:38:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14674 to 14366. [2021-08-21 17:38:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14366 states, 14365 states have (on average 1.5997215454229028) internal successors, (22980), 14365 states have internal predecessors, (22980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14366 states to 14366 states and 22980 transitions. [2021-08-21 17:38:21,688 INFO L78 Accepts]: Start accepts. Automaton has 14366 states and 22980 transitions. Word has length 42 [2021-08-21 17:38:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:21,688 INFO L470 AbstractCegarLoop]: Abstraction has 14366 states and 22980 transitions. [2021-08-21 17:38:21,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14366 states and 22980 transitions. [2021-08-21 17:38:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:21,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:21,700 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:21,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 17:38:21,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:21,905 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash 519852075, now seen corresponding path program 119 times [2021-08-21 17:38:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:21,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400129982] [2021-08-21 17:38:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:21,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:22,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:22,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400129982] [2021-08-21 17:38:22,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400129982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:22,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766538303] [2021-08-21 17:38:22,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:38:22,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:22,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:22,322 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 17:38:22,328 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 17:38:26,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:38:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:26,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766538303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:26,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:26,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-08-21 17:38:26,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201295517] [2021-08-21 17:38:26,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:38:26,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:38:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:38:26,706 INFO L87 Difference]: Start difference. First operand 14366 states and 22980 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:28,885 INFO L93 Difference]: Finished difference Result 14662 states and 23441 transitions. [2021-08-21 17:38:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 17:38:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:28,906 INFO L225 Difference]: With dead ends: 14662 [2021-08-21 17:38:28,906 INFO L226 Difference]: Without dead ends: 14656 [2021-08-21 17:38:28,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1901.2ms TimeCoverageRelationStatistics Valid=626, Invalid=4486, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 17:38:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-08-21 17:38:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14362. [2021-08-21 17:38:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14362 states, 14361 states have (on average 1.599610055010097) internal successors, (22972), 14361 states have internal predecessors, (22972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14362 states to 14362 states and 22972 transitions. [2021-08-21 17:38:29,095 INFO L78 Accepts]: Start accepts. Automaton has 14362 states and 22972 transitions. Word has length 42 [2021-08-21 17:38:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:29,095 INFO L470 AbstractCegarLoop]: Abstraction has 14362 states and 22972 transitions. [2021-08-21 17:38:29,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14362 states and 22972 transitions. [2021-08-21 17:38:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:29,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:29,107 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:29,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 17:38:29,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:29,307 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash -712650531, now seen corresponding path program 120 times [2021-08-21 17:38:29,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:29,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310046732] [2021-08-21 17:38:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:29,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:29,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:29,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310046732] [2021-08-21 17:38:29,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310046732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:29,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586043885] [2021-08-21 17:38:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:38:29,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:29,716 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 17:38:29,717 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 17:38:33,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:38:33,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:33,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:34,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586043885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:34,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:34,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:38:34,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002115405] [2021-08-21 17:38:34,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:38:34,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:34,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:38:34,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:38:34,173 INFO L87 Difference]: Start difference. First operand 14362 states and 22972 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:36,117 INFO L93 Difference]: Finished difference Result 15484 states and 24628 transitions. [2021-08-21 17:38:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:38:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:36,142 INFO L225 Difference]: With dead ends: 15484 [2021-08-21 17:38:36,142 INFO L226 Difference]: Without dead ends: 15454 [2021-08-21 17:38:36,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1189.4ms TimeCoverageRelationStatistics Valid=312, Invalid=2880, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:38:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2021-08-21 17:38:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 14370. [2021-08-21 17:38:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14370 states, 14369 states have (on average 1.599832973762962) internal successors, (22988), 14369 states have internal predecessors, (22988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14370 states to 14370 states and 22988 transitions. [2021-08-21 17:38:36,321 INFO L78 Accepts]: Start accepts. Automaton has 14370 states and 22988 transitions. Word has length 42 [2021-08-21 17:38:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:36,321 INFO L470 AbstractCegarLoop]: Abstraction has 14370 states and 22988 transitions. [2021-08-21 17:38:36,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 14370 states and 22988 transitions. [2021-08-21 17:38:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:36,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:36,332 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:36,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:36,532 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,SelfDestructingSolverStorable131 [2021-08-21 17:38:36,532 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:36,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1295801429, now seen corresponding path program 121 times [2021-08-21 17:38:36,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:36,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418128855] [2021-08-21 17:38:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:36,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:36,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:36,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418128855] [2021-08-21 17:38:36,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418128855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:36,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676072001] [2021-08-21 17:38:36,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:38:36,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:36,882 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 17:38:36,882 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 17:38:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:40,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:40,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:41,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676072001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:41,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:41,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:38:41,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45990341] [2021-08-21 17:38:41,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:38:41,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:41,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:38:41,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:38:41,607 INFO L87 Difference]: Start difference. First operand 14370 states and 22988 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:43,055 INFO L93 Difference]: Finished difference Result 14835 states and 23682 transitions. [2021-08-21 17:38:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:38:43,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:43,076 INFO L225 Difference]: With dead ends: 14835 [2021-08-21 17:38:43,076 INFO L226 Difference]: Without dead ends: 14829 [2021-08-21 17:38:43,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1271.5ms TimeCoverageRelationStatistics Valid=327, Invalid=2535, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:38:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14829 states. [2021-08-21 17:38:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14829 to 14650. [2021-08-21 17:38:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14650 states, 14649 states have (on average 1.6009283910164516) internal successors, (23452), 14649 states have internal predecessors, (23452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14650 states to 14650 states and 23452 transitions. [2021-08-21 17:38:43,251 INFO L78 Accepts]: Start accepts. Automaton has 14650 states and 23452 transitions. Word has length 42 [2021-08-21 17:38:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:43,251 INFO L470 AbstractCegarLoop]: Abstraction has 14650 states and 23452 transitions. [2021-08-21 17:38:43,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 14650 states and 23452 transitions. [2021-08-21 17:38:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:43,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:43,262 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:43,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 17:38:43,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:43,463 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2014460083, now seen corresponding path program 122 times [2021-08-21 17:38:43,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:43,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810763466] [2021-08-21 17:38:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:43,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:43,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:43,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810763466] [2021-08-21 17:38:43,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810763466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:43,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744278897] [2021-08-21 17:38:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:38:43,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:43,827 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 17:38:43,827 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 17:38:47,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:38:47,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:48,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744278897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:48,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:48,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:38:48,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681762623] [2021-08-21 17:38:48,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:38:48,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:38:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:38:48,442 INFO L87 Difference]: Start difference. First operand 14650 states and 23452 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:49,698 INFO L93 Difference]: Finished difference Result 15212 states and 24267 transitions. [2021-08-21 17:38:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:38:49,698 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:49,721 INFO L225 Difference]: With dead ends: 15212 [2021-08-21 17:38:49,721 INFO L226 Difference]: Without dead ends: 15200 [2021-08-21 17:38:49,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1021.8ms TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:38:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15200 states. [2021-08-21 17:38:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15200 to 14662. [2021-08-21 17:38:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14662 states, 14661 states have (on average 1.6011186140099585) internal successors, (23474), 14661 states have internal predecessors, (23474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14662 states to 14662 states and 23474 transitions. [2021-08-21 17:38:49,955 INFO L78 Accepts]: Start accepts. Automaton has 14662 states and 23474 transitions. Word has length 42 [2021-08-21 17:38:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:49,955 INFO L470 AbstractCegarLoop]: Abstraction has 14662 states and 23474 transitions. [2021-08-21 17:38:49,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14662 states and 23474 transitions. [2021-08-21 17:38:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:49,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:49,966 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:49,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:50,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:50,167 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:50,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2046635869, now seen corresponding path program 123 times [2021-08-21 17:38:50,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:50,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520410344] [2021-08-21 17:38:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:50,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:50,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:50,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520410344] [2021-08-21 17:38:50,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520410344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:50,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389186885] [2021-08-21 17:38:50,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:38:50,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:50,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:50,373 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 17:38:50,374 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 17:38:54,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:38:54,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:38:54,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:38:54,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389186885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:54,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:54,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 17:38:54,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027279470] [2021-08-21 17:38:54,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:38:54,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:54,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:38:54,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:38:54,834 INFO L87 Difference]: Start difference. First operand 14662 states and 23474 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:55,587 INFO L93 Difference]: Finished difference Result 17022 states and 27120 transitions. [2021-08-21 17:38:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:38:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:38:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:55,614 INFO L225 Difference]: With dead ends: 17022 [2021-08-21 17:38:55,614 INFO L226 Difference]: Without dead ends: 17016 [2021-08-21 17:38:55,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:38:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17016 states. [2021-08-21 17:38:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17016 to 15114. [2021-08-21 17:38:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15114 states, 15113 states have (on average 1.6027922980215707) internal successors, (24223), 15113 states have internal predecessors, (24223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15114 states to 15114 states and 24223 transitions. [2021-08-21 17:38:55,818 INFO L78 Accepts]: Start accepts. Automaton has 15114 states and 24223 transitions. Word has length 42 [2021-08-21 17:38:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:55,818 INFO L470 AbstractCegarLoop]: Abstraction has 15114 states and 24223 transitions. [2021-08-21 17:38:55,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15114 states and 24223 transitions. [2021-08-21 17:38:55,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:38:55,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:55,831 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:55,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:56,031 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,SelfDestructingSolverStorable134 [2021-08-21 17:38:56,031 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1061930085, now seen corresponding path program 124 times [2021-08-21 17:38:56,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:56,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945813162] [2021-08-21 17:38:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:56,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:56,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:56,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945813162] [2021-08-21 17:38:56,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945813162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:56,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876218761] [2021-08-21 17:38:56,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:38:56,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:56,237 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 17:38:56,238 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 17:39:00,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:39:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:39:00,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876218761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:00,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:00,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 17:39:00,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071050257] [2021-08-21 17:39:00,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:39:00,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:39:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:39:00,845 INFO L87 Difference]: Start difference. First operand 15114 states and 24223 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:01,354 INFO L93 Difference]: Finished difference Result 15437 states and 24675 transitions. [2021-08-21 17:39:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:39:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:01,377 INFO L225 Difference]: With dead ends: 15437 [2021-08-21 17:39:01,377 INFO L226 Difference]: Without dead ends: 15431 [2021-08-21 17:39:01,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:39:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15431 states. [2021-08-21 17:39:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15431 to 15303. [2021-08-21 17:39:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15303 states, 15302 states have (on average 1.601359299437982) internal successors, (24504), 15302 states have internal predecessors, (24504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15303 states to 15303 states and 24504 transitions. [2021-08-21 17:39:01,562 INFO L78 Accepts]: Start accepts. Automaton has 15303 states and 24504 transitions. Word has length 42 [2021-08-21 17:39:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:01,562 INFO L470 AbstractCegarLoop]: Abstraction has 15303 states and 24504 transitions. [2021-08-21 17:39:01,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 15303 states and 24504 transitions. [2021-08-21 17:39:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:01,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:01,574 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:01,600 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 17:39:01,774 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,SelfDestructingSolverStorable135 [2021-08-21 17:39:01,774 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:01,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2035109939, now seen corresponding path program 125 times [2021-08-21 17:39:01,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:01,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250116493] [2021-08-21 17:39:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:01,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:01,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:01,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250116493] [2021-08-21 17:39:01,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250116493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:01,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947662025] [2021-08-21 17:39:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:39:01,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:01,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:01,979 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 17:39:01,980 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 17:39:06,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:39:06,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:06,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:39:06,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947662025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:06,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:06,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-21 17:39:06,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638365088] [2021-08-21 17:39:06,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:39:06,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:06,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:39:06,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:39:06,534 INFO L87 Difference]: Start difference. First operand 15303 states and 24504 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:07,439 INFO L93 Difference]: Finished difference Result 16079 states and 25645 transitions. [2021-08-21 17:39:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:39:07,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:07,461 INFO L225 Difference]: With dead ends: 16079 [2021-08-21 17:39:07,462 INFO L226 Difference]: Without dead ends: 16067 [2021-08-21 17:39:07,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 700.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:39:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16067 states. [2021-08-21 17:39:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16067 to 15739. [2021-08-21 17:39:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15739 states, 15738 states have (on average 1.6013470580759943) internal successors, (25202), 15738 states have internal predecessors, (25202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15739 states to 15739 states and 25202 transitions. [2021-08-21 17:39:07,655 INFO L78 Accepts]: Start accepts. Automaton has 15739 states and 25202 transitions. Word has length 42 [2021-08-21 17:39:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:07,655 INFO L470 AbstractCegarLoop]: Abstraction has 15739 states and 25202 transitions. [2021-08-21 17:39:07,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 15739 states and 25202 transitions. [2021-08-21 17:39:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:07,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:07,668 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:07,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:07,868 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,SelfDestructingSolverStorable136 [2021-08-21 17:39:07,869 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:07,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1203777211, now seen corresponding path program 126 times [2021-08-21 17:39:07,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:07,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034639592] [2021-08-21 17:39:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:07,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:08,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:08,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034639592] [2021-08-21 17:39:08,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034639592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:08,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804881515] [2021-08-21 17:39:08,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:39:08,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:08,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:08,070 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 17:39:08,071 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 17:39:12,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:39:12,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:39:12,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804881515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:12,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:12,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 17:39:12,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236273190] [2021-08-21 17:39:12,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:39:12,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:39:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:39:12,710 INFO L87 Difference]: Start difference. First operand 15739 states and 25202 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:13,235 INFO L93 Difference]: Finished difference Result 17044 states and 27170 transitions. [2021-08-21 17:39:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:39:13,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:13,261 INFO L225 Difference]: With dead ends: 17044 [2021-08-21 17:39:13,262 INFO L226 Difference]: Without dead ends: 17020 [2021-08-21 17:39:13,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:39:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-08-21 17:39:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 16090. [2021-08-21 17:39:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16090 states, 16089 states have (on average 1.601466840698614) internal successors, (25766), 16089 states have internal predecessors, (25766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16090 states to 16090 states and 25766 transitions. [2021-08-21 17:39:13,479 INFO L78 Accepts]: Start accepts. Automaton has 16090 states and 25766 transitions. Word has length 42 [2021-08-21 17:39:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:13,479 INFO L470 AbstractCegarLoop]: Abstraction has 16090 states and 25766 transitions. [2021-08-21 17:39:13,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 16090 states and 25766 transitions. [2021-08-21 17:39:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:13,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:13,492 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:13,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 17:39:13,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:13,693 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:13,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1741723553, now seen corresponding path program 127 times [2021-08-21 17:39:13,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:13,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578084267] [2021-08-21 17:39:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:13,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:13,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:13,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578084267] [2021-08-21 17:39:13,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578084267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:13,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226611049] [2021-08-21 17:39:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:39:13,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:13,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:13,891 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 17:39:13,892 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 17:39:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:18,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:18,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:39:18,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226611049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:18,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:18,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-21 17:39:18,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584735059] [2021-08-21 17:39:18,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:39:18,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:39:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:39:18,591 INFO L87 Difference]: Start difference. First operand 16090 states and 25766 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:19,041 INFO L93 Difference]: Finished difference Result 16690 states and 26644 transitions. [2021-08-21 17:39:19,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:39:19,042 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:19,065 INFO L225 Difference]: With dead ends: 16690 [2021-08-21 17:39:19,066 INFO L226 Difference]: Without dead ends: 16672 [2021-08-21 17:39:19,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:39:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-08-21 17:39:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 16501. [2021-08-21 17:39:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16501 states, 16500 states have (on average 1.6003636363636364) internal successors, (26406), 16500 states have internal predecessors, (26406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16501 states to 16501 states and 26406 transitions. [2021-08-21 17:39:19,268 INFO L78 Accepts]: Start accepts. Automaton has 16501 states and 26406 transitions. Word has length 42 [2021-08-21 17:39:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:19,268 INFO L470 AbstractCegarLoop]: Abstraction has 16501 states and 26406 transitions. [2021-08-21 17:39:19,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 16501 states and 26406 transitions. [2021-08-21 17:39:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:19,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:19,282 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:19,308 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 17:39:19,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 17:39:19,482 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash 773460953, now seen corresponding path program 128 times [2021-08-21 17:39:19,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:19,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873921944] [2021-08-21 17:39:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:19,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:19,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:19,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873921944] [2021-08-21 17:39:19,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873921944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:19,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376502769] [2021-08-21 17:39:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:39:19,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:19,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:19,698 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 17:39:19,698 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 17:39:23,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:39:23,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:23,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:39:24,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376502769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:24,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:24,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 17:39:24,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237757602] [2021-08-21 17:39:24,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:39:24,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:39:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:39:24,361 INFO L87 Difference]: Start difference. First operand 16501 states and 26406 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:24,870 INFO L93 Difference]: Finished difference Result 16851 states and 26937 transitions. [2021-08-21 17:39:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:39:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:24,897 INFO L225 Difference]: With dead ends: 16851 [2021-08-21 17:39:24,897 INFO L226 Difference]: Without dead ends: 16845 [2021-08-21 17:39:24,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:39:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16845 states. [2021-08-21 17:39:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16845 to 16646. [2021-08-21 17:39:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16646 states, 16645 states have (on average 1.6011414839291078) internal successors, (26651), 16645 states have internal predecessors, (26651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16646 states to 16646 states and 26651 transitions. [2021-08-21 17:39:25,200 INFO L78 Accepts]: Start accepts. Automaton has 16646 states and 26651 transitions. Word has length 42 [2021-08-21 17:39:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:25,200 INFO L470 AbstractCegarLoop]: Abstraction has 16646 states and 26651 transitions. [2021-08-21 17:39:25,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 16646 states and 26651 transitions. [2021-08-21 17:39:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:25,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:25,212 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:25,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:25,413 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,SelfDestructingSolverStorable139 [2021-08-21 17:39:25,413 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 928504037, now seen corresponding path program 129 times [2021-08-21 17:39:25,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:25,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650206993] [2021-08-21 17:39:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:25,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:25,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650206993] [2021-08-21 17:39:25,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650206993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774017106] [2021-08-21 17:39:25,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:39:25,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:25,608 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 17:39:25,609 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 17:39:29,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:39:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:39:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774017106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:30,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:30,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 17:39:30,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295527005] [2021-08-21 17:39:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:39:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:39:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:39:30,202 INFO L87 Difference]: Start difference. First operand 16646 states and 26651 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:31,138 INFO L93 Difference]: Finished difference Result 18290 states and 29099 transitions. [2021-08-21 17:39:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:39:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:31,165 INFO L225 Difference]: With dead ends: 18290 [2021-08-21 17:39:31,165 INFO L226 Difference]: Without dead ends: 18284 [2021-08-21 17:39:31,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 659.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:39:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18284 states. [2021-08-21 17:39:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18284 to 17998. [2021-08-21 17:39:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17998 states, 17997 states have (on average 1.597932988831472) internal successors, (28758), 17997 states have internal predecessors, (28758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17998 states to 17998 states and 28758 transitions. [2021-08-21 17:39:31,387 INFO L78 Accepts]: Start accepts. Automaton has 17998 states and 28758 transitions. Word has length 42 [2021-08-21 17:39:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:31,387 INFO L470 AbstractCegarLoop]: Abstraction has 17998 states and 28758 transitions. [2021-08-21 17:39:31,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 17998 states and 28758 transitions. [2021-08-21 17:39:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:31,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:31,401 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:31,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:31,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:31,601 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1249581353, now seen corresponding path program 130 times [2021-08-21 17:39:31,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:31,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277251119] [2021-08-21 17:39:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:31,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:31,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:31,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277251119] [2021-08-21 17:39:31,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277251119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:31,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121895869] [2021-08-21 17:39:31,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:39:31,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:31,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:31,791 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 17:39:31,792 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 17:39:36,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:39:36,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:39:36,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121895869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:36,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:36,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-21 17:39:36,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782985048] [2021-08-21 17:39:36,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:39:36,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:39:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:39:36,689 INFO L87 Difference]: Start difference. First operand 17998 states and 28758 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:37,214 INFO L93 Difference]: Finished difference Result 19562 states and 31133 transitions. [2021-08-21 17:39:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:39:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:37,242 INFO L225 Difference]: With dead ends: 19562 [2021-08-21 17:39:37,242 INFO L226 Difference]: Without dead ends: 19544 [2021-08-21 17:39:37,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 477.7ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:39:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19544 states. [2021-08-21 17:39:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19544 to 17602. [2021-08-21 17:39:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17602 states, 17601 states have (on average 1.5973524231577751) internal successors, (28115), 17601 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17602 states to 17602 states and 28115 transitions. [2021-08-21 17:39:37,470 INFO L78 Accepts]: Start accepts. Automaton has 17602 states and 28115 transitions. Word has length 42 [2021-08-21 17:39:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:37,470 INFO L470 AbstractCegarLoop]: Abstraction has 17602 states and 28115 transitions. [2021-08-21 17:39:37,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 17602 states and 28115 transitions. [2021-08-21 17:39:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:37,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:37,483 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:37,510 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 17:39:37,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:37,684 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash 389955813, now seen corresponding path program 131 times [2021-08-21 17:39:37,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:37,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926098075] [2021-08-21 17:39:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:37,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:37,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:37,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926098075] [2021-08-21 17:39:37,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926098075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:37,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947622412] [2021-08-21 17:39:37,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:39:37,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:37,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:37,874 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 17:39:37,874 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 17:39:42,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:39:42,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:42,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:39:42,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947622412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:42,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:42,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 17:39:42,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94177715] [2021-08-21 17:39:42,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:39:42,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:39:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:39:42,785 INFO L87 Difference]: Start difference. First operand 17602 states and 28115 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:43,431 INFO L93 Difference]: Finished difference Result 18641 states and 29628 transitions. [2021-08-21 17:39:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:39:43,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:43,459 INFO L225 Difference]: With dead ends: 18641 [2021-08-21 17:39:43,459 INFO L226 Difference]: Without dead ends: 18605 [2021-08-21 17:39:43,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:39:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18605 states. [2021-08-21 17:39:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18605 to 17813. [2021-08-21 17:39:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17813 states, 17812 states have (on average 1.5966202560071863) internal successors, (28439), 17812 states have internal predecessors, (28439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17813 states to 17813 states and 28439 transitions. [2021-08-21 17:39:43,697 INFO L78 Accepts]: Start accepts. Automaton has 17813 states and 28439 transitions. Word has length 42 [2021-08-21 17:39:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:43,697 INFO L470 AbstractCegarLoop]: Abstraction has 17813 states and 28439 transitions. [2021-08-21 17:39:43,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17813 states and 28439 transitions. [2021-08-21 17:39:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:43,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:43,710 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:43,738 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 17:39:43,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:43,911 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1985175181, now seen corresponding path program 132 times [2021-08-21 17:39:43,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:43,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492546622] [2021-08-21 17:39:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:43,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:44,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:44,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492546622] [2021-08-21 17:39:44,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492546622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:44,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480240562] [2021-08-21 17:39:44,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:39:44,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:44,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:44,107 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 17:39:44,107 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 17:39:48,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:39:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:39:48,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480240562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:48,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:48,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 17:39:48,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321919834] [2021-08-21 17:39:48,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:39:48,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:39:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:39:48,929 INFO L87 Difference]: Start difference. First operand 17813 states and 28439 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:49,563 INFO L93 Difference]: Finished difference Result 18184 states and 29013 transitions. [2021-08-21 17:39:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:39:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:49,587 INFO L225 Difference]: With dead ends: 18184 [2021-08-21 17:39:49,587 INFO L226 Difference]: Without dead ends: 18178 [2021-08-21 17:39:49,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:39:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-08-21 17:39:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17936. [2021-08-21 17:39:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17936 states, 17935 states have (on average 1.5969333705046) internal successors, (28641), 17935 states have internal predecessors, (28641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17936 states to 17936 states and 28641 transitions. [2021-08-21 17:39:49,789 INFO L78 Accepts]: Start accepts. Automaton has 17936 states and 28641 transitions. Word has length 42 [2021-08-21 17:39:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:49,789 INFO L470 AbstractCegarLoop]: Abstraction has 17936 states and 28641 transitions. [2021-08-21 17:39:49,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17936 states and 28641 transitions. [2021-08-21 17:39:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:49,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:49,802 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:49,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-21 17:39:50,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:50,002 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash 607200647, now seen corresponding path program 133 times [2021-08-21 17:39:50,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:50,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023931508] [2021-08-21 17:39:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:50,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:50,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:50,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023931508] [2021-08-21 17:39:50,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023931508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:50,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282515979] [2021-08-21 17:39:50,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:39:50,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:50,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:50,194 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 17:39:50,195 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 17:39:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:54,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:39:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:39:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282515979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:55,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:55,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-21 17:39:55,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685730367] [2021-08-21 17:39:55,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:39:55,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:39:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:39:55,126 INFO L87 Difference]: Start difference. First operand 17936 states and 28641 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:55,566 INFO L93 Difference]: Finished difference Result 18714 states and 29812 transitions. [2021-08-21 17:39:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:39:55,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:39:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:55,592 INFO L225 Difference]: With dead ends: 18714 [2021-08-21 17:39:55,592 INFO L226 Difference]: Without dead ends: 18696 [2021-08-21 17:39:55,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:39:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18696 states. [2021-08-21 17:39:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18696 to 17392. [2021-08-21 17:39:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17392 states, 17391 states have (on average 1.5954229199010983) internal successors, (27746), 17391 states have internal predecessors, (27746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17392 states to 17392 states and 27746 transitions. [2021-08-21 17:39:55,882 INFO L78 Accepts]: Start accepts. Automaton has 17392 states and 27746 transitions. Word has length 42 [2021-08-21 17:39:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:55,882 INFO L470 AbstractCegarLoop]: Abstraction has 17392 states and 27746 transitions. [2021-08-21 17:39:55,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 17392 states and 27746 transitions. [2021-08-21 17:39:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:39:55,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:55,896 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:55,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:56,096 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,SelfDestructingSolverStorable144 [2021-08-21 17:39:56,096 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -136178817, now seen corresponding path program 134 times [2021-08-21 17:39:56,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:56,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598855246] [2021-08-21 17:39:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:56,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:56,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:56,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598855246] [2021-08-21 17:39:56,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598855246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:56,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339528925] [2021-08-21 17:39:56,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:39:56,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:56,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:56,286 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 17:39:56,290 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 17:40:00,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:40:00,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:00,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:40:00,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:40:01,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339528925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:01,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:01,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-21 17:40:01,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676692224] [2021-08-21 17:40:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:40:01,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:40:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:40:01,378 INFO L87 Difference]: Start difference. First operand 17392 states and 27746 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:01,868 INFO L93 Difference]: Finished difference Result 17728 states and 28220 transitions. [2021-08-21 17:40:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:40:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:40:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:01,892 INFO L225 Difference]: With dead ends: 17728 [2021-08-21 17:40:01,892 INFO L226 Difference]: Without dead ends: 17710 [2021-08-21 17:40:01,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:40:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17710 states. [2021-08-21 17:40:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17710 to 17392. [2021-08-21 17:40:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17392 states, 17391 states have (on average 1.5954229199010983) internal successors, (27746), 17391 states have internal predecessors, (27746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17392 states to 17392 states and 27746 transitions. [2021-08-21 17:40:02,109 INFO L78 Accepts]: Start accepts. Automaton has 17392 states and 27746 transitions. Word has length 42 [2021-08-21 17:40:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:02,109 INFO L470 AbstractCegarLoop]: Abstraction has 17392 states and 27746 transitions. [2021-08-21 17:40:02,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 17392 states and 27746 transitions. [2021-08-21 17:40:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:40:02,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:02,122 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:02,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:02,323 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,SelfDestructingSolverStorable145 [2021-08-21 17:40:02,323 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 723526195, now seen corresponding path program 135 times [2021-08-21 17:40:02,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:02,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601064545] [2021-08-21 17:40:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:02,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:02,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:02,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601064545] [2021-08-21 17:40:02,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601064545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:02,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99153192] [2021-08-21 17:40:02,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:40:02,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:02,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:02,646 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 17:40:02,647 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 17:40:07,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:40:07,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:40:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:40:07,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99153192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:07,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:07,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 17:40:07,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021910196] [2021-08-21 17:40:07,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:40:07,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:40:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:40:07,577 INFO L87 Difference]: Start difference. First operand 17392 states and 27746 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:08,322 INFO L93 Difference]: Finished difference Result 19707 states and 31169 transitions. [2021-08-21 17:40:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:40:08,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:40:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:08,387 INFO L225 Difference]: With dead ends: 19707 [2021-08-21 17:40:08,387 INFO L226 Difference]: Without dead ends: 19701 [2021-08-21 17:40:08,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:40:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19701 states. [2021-08-21 17:40:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19701 to 17828. [2021-08-21 17:40:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17828 states, 17827 states have (on average 1.5946036910304595) internal successors, (28427), 17827 states have internal predecessors, (28427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17828 states to 17828 states and 28427 transitions. [2021-08-21 17:40:08,599 INFO L78 Accepts]: Start accepts. Automaton has 17828 states and 28427 transitions. Word has length 42 [2021-08-21 17:40:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:08,600 INFO L470 AbstractCegarLoop]: Abstraction has 17828 states and 28427 transitions. [2021-08-21 17:40:08,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 17828 states and 28427 transitions. [2021-08-21 17:40:08,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:40:08,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:08,613 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:08,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-21 17:40:08,813 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,SelfDestructingSolverStorable146 [2021-08-21 17:40:08,813 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1969064741, now seen corresponding path program 136 times [2021-08-21 17:40:08,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:08,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892021271] [2021-08-21 17:40:08,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:08,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:09,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:09,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892021271] [2021-08-21 17:40:09,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892021271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:09,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008955836] [2021-08-21 17:40:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:40:09,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:09,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:09,014 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 17:40:09,015 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 17:40:13,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:40:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:13,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:40:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:40:14,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008955836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:14,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:14,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 17:40:14,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010314829] [2021-08-21 17:40:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:40:14,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:40:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:40:14,234 INFO L87 Difference]: Start difference. First operand 17828 states and 28427 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:14,848 INFO L93 Difference]: Finished difference Result 18272 states and 29066 transitions. [2021-08-21 17:40:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:40:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:40:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:14,875 INFO L225 Difference]: With dead ends: 18272 [2021-08-21 17:40:14,875 INFO L226 Difference]: Without dead ends: 18266 [2021-08-21 17:40:14,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:40:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18266 states. [2021-08-21 17:40:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18266 to 17923. [2021-08-21 17:40:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17923 states, 17922 states have (on average 1.594632295502734) internal successors, (28579), 17922 states have internal predecessors, (28579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17923 states to 17923 states and 28579 transitions. [2021-08-21 17:40:15,101 INFO L78 Accepts]: Start accepts. Automaton has 17923 states and 28579 transitions. Word has length 42 [2021-08-21 17:40:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:15,102 INFO L470 AbstractCegarLoop]: Abstraction has 17923 states and 28579 transitions. [2021-08-21 17:40:15,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 17923 states and 28579 transitions. [2021-08-21 17:40:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 17:40:15,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:15,115 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:15,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 17:40:15,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:15,317 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 312010051, now seen corresponding path program 9 times [2021-08-21 17:40:15,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:15,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015653016] [2021-08-21 17:40:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:15,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:15,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:15,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015653016] [2021-08-21 17:40:15,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015653016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:15,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144965993] [2021-08-21 17:40:15,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:40:15,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:15,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:15,416 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 17:40:15,417 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 17:40:20,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:40:20,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:20,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:40:20,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:20,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144965993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:20,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:20,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-21 17:40:20,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102643089] [2021-08-21 17:40:20,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:40:20,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:20,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:40:20,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:40:20,150 INFO L87 Difference]: Start difference. First operand 17923 states and 28579 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:20,380 INFO L93 Difference]: Finished difference Result 19148 states and 30385 transitions. [2021-08-21 17:40:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:40:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 17:40:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:20,408 INFO L225 Difference]: With dead ends: 19148 [2021-08-21 17:40:20,408 INFO L226 Difference]: Without dead ends: 19148 [2021-08-21 17:40:20,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:40:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19148 states. [2021-08-21 17:40:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19148 to 17902. [2021-08-21 17:40:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17902 states, 17901 states have (on average 1.5937098486118093) internal successors, (28529), 17901 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17902 states to 17902 states and 28529 transitions. [2021-08-21 17:40:20,635 INFO L78 Accepts]: Start accepts. Automaton has 17902 states and 28529 transitions. Word has length 43 [2021-08-21 17:40:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:20,635 INFO L470 AbstractCegarLoop]: Abstraction has 17902 states and 28529 transitions. [2021-08-21 17:40:20,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17902 states and 28529 transitions. [2021-08-21 17:40:20,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:40:20,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:20,651 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:20,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-21 17:40:20,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:20,851 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1664887396, now seen corresponding path program 137 times [2021-08-21 17:40:20,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:20,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869179546] [2021-08-21 17:40:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:20,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:21,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:21,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869179546] [2021-08-21 17:40:21,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869179546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:21,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126229206] [2021-08-21 17:40:21,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:40:21,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:21,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:21,271 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 17:40:21,271 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 17:40:25,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:40:25,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:40:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:26,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126229206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:26,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:26,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-21 17:40:26,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058481469] [2021-08-21 17:40:26,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:40:26,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:40:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:40:26,618 INFO L87 Difference]: Start difference. First operand 17902 states and 28529 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:27,591 INFO L93 Difference]: Finished difference Result 19914 states and 31691 transitions. [2021-08-21 17:40:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:40:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:40:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:27,620 INFO L225 Difference]: With dead ends: 19914 [2021-08-21 17:40:27,620 INFO L226 Difference]: Without dead ends: 19892 [2021-08-21 17:40:27,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:40:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19892 states. [2021-08-21 17:40:27,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19892 to 19111. [2021-08-21 17:40:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19111 states, 19110 states have (on average 1.6056514913657771) internal successors, (30684), 19110 states have internal predecessors, (30684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19111 states to 19111 states and 30684 transitions. [2021-08-21 17:40:27,861 INFO L78 Accepts]: Start accepts. Automaton has 19111 states and 30684 transitions. Word has length 44 [2021-08-21 17:40:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:27,861 INFO L470 AbstractCegarLoop]: Abstraction has 19111 states and 30684 transitions. [2021-08-21 17:40:27,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 19111 states and 30684 transitions. [2021-08-21 17:40:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:40:27,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:27,877 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:27,906 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 17:40:28,077 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,SelfDestructingSolverStorable149 [2021-08-21 17:40:28,078 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash 972366310, now seen corresponding path program 138 times [2021-08-21 17:40:28,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:28,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231743624] [2021-08-21 17:40:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:28,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:28,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:28,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231743624] [2021-08-21 17:40:28,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231743624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:28,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897241673] [2021-08-21 17:40:28,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:40:28,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:28,385 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 17:40:28,385 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 17:40:33,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:40:33,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:40:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:33,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897241673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:33,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:33,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-21 17:40:33,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871231439] [2021-08-21 17:40:33,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:40:33,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:40:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:40:33,735 INFO L87 Difference]: Start difference. First operand 19111 states and 30684 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:34,573 INFO L93 Difference]: Finished difference Result 19692 states and 31571 transitions. [2021-08-21 17:40:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:40:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:40:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:34,605 INFO L225 Difference]: With dead ends: 19692 [2021-08-21 17:40:34,605 INFO L226 Difference]: Without dead ends: 19674 [2021-08-21 17:40:34,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 704.7ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:40:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19674 states. [2021-08-21 17:40:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19674 to 19464. [2021-08-21 17:40:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19464 states, 19463 states have (on average 1.6086934182808406) internal successors, (31310), 19463 states have internal predecessors, (31310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19464 states to 19464 states and 31310 transitions. [2021-08-21 17:40:34,844 INFO L78 Accepts]: Start accepts. Automaton has 19464 states and 31310 transitions. Word has length 44 [2021-08-21 17:40:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:34,844 INFO L470 AbstractCegarLoop]: Abstraction has 19464 states and 31310 transitions. [2021-08-21 17:40:34,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 19464 states and 31310 transitions. [2021-08-21 17:40:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:40:34,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:34,860 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:34,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:35,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:35,061 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 794073556, now seen corresponding path program 139 times [2021-08-21 17:40:35,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:35,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3356516] [2021-08-21 17:40:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:35,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:35,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:35,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3356516] [2021-08-21 17:40:35,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3356516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:35,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771546200] [2021-08-21 17:40:35,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:40:35,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:35,348 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 17:40:35,348 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 17:40:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:40,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:40:40,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:40,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771546200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:40,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:40,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-08-21 17:40:40,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129263858] [2021-08-21 17:40:40,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:40:40,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:40:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:40:40,854 INFO L87 Difference]: Start difference. First operand 19464 states and 31310 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:41,780 INFO L93 Difference]: Finished difference Result 19670 states and 31606 transitions. [2021-08-21 17:40:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:40:41,780 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:40:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:41,809 INFO L225 Difference]: With dead ends: 19670 [2021-08-21 17:40:41,809 INFO L226 Difference]: Without dead ends: 19652 [2021-08-21 17:40:41,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 821.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:40:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19652 states. [2021-08-21 17:40:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19652 to 19566. [2021-08-21 17:40:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19566 states, 19565 states have (on average 1.60950677229747) internal successors, (31490), 19565 states have internal predecessors, (31490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19566 states to 19566 states and 31490 transitions. [2021-08-21 17:40:42,047 INFO L78 Accepts]: Start accepts. Automaton has 19566 states and 31490 transitions. Word has length 44 [2021-08-21 17:40:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:42,047 INFO L470 AbstractCegarLoop]: Abstraction has 19566 states and 31490 transitions. [2021-08-21 17:40:42,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 19566 states and 31490 transitions. [2021-08-21 17:40:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:40:42,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:42,063 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:42,092 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 17:40:42,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:42,264 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:42,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1397573930, now seen corresponding path program 140 times [2021-08-21 17:40:42,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:42,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184031017] [2021-08-21 17:40:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:42,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:42,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:42,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184031017] [2021-08-21 17:40:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184031017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:42,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198374459] [2021-08-21 17:40:42,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:40:42,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:42,671 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 17:40:42,671 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 17:40:47,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:40:47,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:40:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:48,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198374459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:48,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:48,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-21 17:40:48,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597795642] [2021-08-21 17:40:48,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:40:48,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:40:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:40:48,191 INFO L87 Difference]: Start difference. First operand 19566 states and 31490 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:49,399 INFO L93 Difference]: Finished difference Result 21372 states and 34295 transitions. [2021-08-21 17:40:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:40:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:40:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:49,432 INFO L225 Difference]: With dead ends: 21372 [2021-08-21 17:40:49,432 INFO L226 Difference]: Without dead ends: 21350 [2021-08-21 17:40:49,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:40:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21350 states. [2021-08-21 17:40:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21350 to 19939. [2021-08-21 17:40:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19939 states, 19938 states have (on average 1.6125990570769384) internal successors, (32152), 19938 states have internal predecessors, (32152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19939 states to 19939 states and 32152 transitions. [2021-08-21 17:40:49,696 INFO L78 Accepts]: Start accepts. Automaton has 19939 states and 32152 transitions. Word has length 44 [2021-08-21 17:40:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:49,696 INFO L470 AbstractCegarLoop]: Abstraction has 19939 states and 32152 transitions. [2021-08-21 17:40:49,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 19939 states and 32152 transitions. [2021-08-21 17:40:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:40:49,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:49,713 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:49,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:49,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:49,922 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2145783002, now seen corresponding path program 141 times [2021-08-21 17:40:49,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:49,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038774274] [2021-08-21 17:40:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:49,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:50,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:50,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038774274] [2021-08-21 17:40:50,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038774274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:50,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474310070] [2021-08-21 17:40:50,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:40:50,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:50,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:50,213 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 17:40:50,214 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 17:40:55,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:40:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:55,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:40:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:55,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474310070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:55,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:55,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-08-21 17:40:55,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681531697] [2021-08-21 17:40:55,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:40:55,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:55,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:40:55,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:40:55,761 INFO L87 Difference]: Start difference. First operand 19939 states and 32152 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:57,278 INFO L93 Difference]: Finished difference Result 21449 states and 34477 transitions. [2021-08-21 17:40:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:40:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:40:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:57,314 INFO L225 Difference]: With dead ends: 21449 [2021-08-21 17:40:57,314 INFO L226 Difference]: Without dead ends: 21437 [2021-08-21 17:40:57,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 922.7ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:40:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21437 states. [2021-08-21 17:40:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21437 to 20336. [2021-08-21 17:40:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20336 states, 20335 states have (on average 1.6176542906319153) internal successors, (32895), 20335 states have internal predecessors, (32895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20336 states to 20336 states and 32895 transitions. [2021-08-21 17:40:57,608 INFO L78 Accepts]: Start accepts. Automaton has 20336 states and 32895 transitions. Word has length 44 [2021-08-21 17:40:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:57,608 INFO L470 AbstractCegarLoop]: Abstraction has 20336 states and 32895 transitions. [2021-08-21 17:40:57,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20336 states and 32895 transitions. [2021-08-21 17:40:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:40:57,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:57,626 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:57,656 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 17:40:57,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:57,826 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:57,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1542282628, now seen corresponding path program 142 times [2021-08-21 17:40:57,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:57,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847859575] [2021-08-21 17:40:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:57,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:58,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:58,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847859575] [2021-08-21 17:40:58,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847859575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:58,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672955900] [2021-08-21 17:40:58,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:40:58,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:58,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:58,118 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 17:40:58,119 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 17:41:03,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:41:03,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:03,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672955900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:03,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:03,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-21 17:41:03,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135766481] [2021-08-21 17:41:03,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:41:03,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:41:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:41:03,868 INFO L87 Difference]: Start difference. First operand 20336 states and 32895 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:04,789 INFO L93 Difference]: Finished difference Result 21225 states and 34242 transitions. [2021-08-21 17:41:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:41:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:04,823 INFO L225 Difference]: With dead ends: 21225 [2021-08-21 17:41:04,823 INFO L226 Difference]: Without dead ends: 21209 [2021-08-21 17:41:04,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 821.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:41:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21209 states. [2021-08-21 17:41:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21209 to 20822. [2021-08-21 17:41:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20822 states, 20821 states have (on average 1.6203832668940013) internal successors, (33738), 20821 states have internal predecessors, (33738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20822 states to 20822 states and 33738 transitions. [2021-08-21 17:41:05,107 INFO L78 Accepts]: Start accepts. Automaton has 20822 states and 33738 transitions. Word has length 44 [2021-08-21 17:41:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:05,107 INFO L470 AbstractCegarLoop]: Abstraction has 20822 states and 33738 transitions. [2021-08-21 17:41:05,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 20822 states and 33738 transitions. [2021-08-21 17:41:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:05,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:05,124 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:05,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:05,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:05,325 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1395741850, now seen corresponding path program 143 times [2021-08-21 17:41:05,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:05,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3993531] [2021-08-21 17:41:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:05,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:05,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:05,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3993531] [2021-08-21 17:41:05,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3993531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:05,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566514999] [2021-08-21 17:41:05,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:41:05,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:05,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:05,623 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 17:41:05,624 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 17:41:10,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:41:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:11,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566514999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:11,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:11,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-21 17:41:11,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808487288] [2021-08-21 17:41:11,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:41:11,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:41:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:41:11,318 INFO L87 Difference]: Start difference. First operand 20822 states and 33738 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:12,412 INFO L93 Difference]: Finished difference Result 21802 states and 35223 transitions. [2021-08-21 17:41:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:41:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:12,444 INFO L225 Difference]: With dead ends: 21802 [2021-08-21 17:41:12,444 INFO L226 Difference]: Without dead ends: 21786 [2021-08-21 17:41:12,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:41:12,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21786 states. [2021-08-21 17:41:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21786 to 21359. [2021-08-21 17:41:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21359 states, 21358 states have (on average 1.6237475419046727) internal successors, (34680), 21358 states have internal predecessors, (34680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 34680 transitions. [2021-08-21 17:41:12,780 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 34680 transitions. Word has length 44 [2021-08-21 17:41:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:12,780 INFO L470 AbstractCegarLoop]: Abstraction has 21359 states and 34680 transitions. [2021-08-21 17:41:12,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 34680 transitions. [2021-08-21 17:41:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:12,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:12,798 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:12,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:12,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 17:41:12,999 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:12,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1985715676, now seen corresponding path program 144 times [2021-08-21 17:41:12,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:13,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335441645] [2021-08-21 17:41:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:13,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:13,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:13,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335441645] [2021-08-21 17:41:13,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335441645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:13,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418810079] [2021-08-21 17:41:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:41:13,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:13,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:13,259 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 17:41:13,259 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 17:41:18,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:41:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418810079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:19,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:19,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-08-21 17:41:19,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130292867] [2021-08-21 17:41:19,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 17:41:19,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:19,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 17:41:19,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:41:19,098 INFO L87 Difference]: Start difference. First operand 21359 states and 34680 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:20,744 INFO L93 Difference]: Finished difference Result 22674 states and 36662 transitions. [2021-08-21 17:41:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 17:41:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:20,779 INFO L225 Difference]: With dead ends: 22674 [2021-08-21 17:41:20,780 INFO L226 Difference]: Without dead ends: 22662 [2021-08-21 17:41:20,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1270.0ms TimeCoverageRelationStatistics Valid=243, Invalid=3179, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:41:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22662 states. [2021-08-21 17:41:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22662 to 21572. [2021-08-21 17:41:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21572 states, 21571 states have (on average 1.6248203606694174) internal successors, (35049), 21571 states have internal predecessors, (35049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21572 states to 21572 states and 35049 transitions. [2021-08-21 17:41:21,057 INFO L78 Accepts]: Start accepts. Automaton has 21572 states and 35049 transitions. Word has length 44 [2021-08-21 17:41:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:21,057 INFO L470 AbstractCegarLoop]: Abstraction has 21572 states and 35049 transitions. [2021-08-21 17:41:21,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21572 states and 35049 transitions. [2021-08-21 17:41:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:21,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:21,075 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:21,106 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 17:41:21,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:21,275 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash 477869400, now seen corresponding path program 145 times [2021-08-21 17:41:21,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:21,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669859263] [2021-08-21 17:41:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:21,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:21,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:21,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669859263] [2021-08-21 17:41:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669859263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:21,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639288818] [2021-08-21 17:41:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:41:21,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:21,695 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 17:41:21,696 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 17:41:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:26,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:27,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639288818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:27,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:27,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:41:27,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3507217] [2021-08-21 17:41:27,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:41:27,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:41:27,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:41:27,295 INFO L87 Difference]: Start difference. First operand 21572 states and 35049 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:28,109 INFO L93 Difference]: Finished difference Result 21691 states and 35218 transitions. [2021-08-21 17:41:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:41:28,110 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:28,142 INFO L225 Difference]: With dead ends: 21691 [2021-08-21 17:41:28,143 INFO L226 Difference]: Without dead ends: 21685 [2021-08-21 17:41:28,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:41:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21685 states. [2021-08-21 17:41:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21685 to 21619. [2021-08-21 17:41:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21619 states, 21618 states have (on average 1.6251272088074753) internal successors, (35132), 21618 states have internal predecessors, (35132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21619 states to 21619 states and 35132 transitions. [2021-08-21 17:41:28,516 INFO L78 Accepts]: Start accepts. Automaton has 21619 states and 35132 transitions. Word has length 44 [2021-08-21 17:41:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:28,516 INFO L470 AbstractCegarLoop]: Abstraction has 21619 states and 35132 transitions. [2021-08-21 17:41:28,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 21619 states and 35132 transitions. [2021-08-21 17:41:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:28,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:28,533 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:28,563 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 17:41:28,733 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,SelfDestructingSolverStorable157 [2021-08-21 17:41:28,733 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2008614738, now seen corresponding path program 146 times [2021-08-21 17:41:28,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:28,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262424438] [2021-08-21 17:41:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:28,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:29,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:29,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262424438] [2021-08-21 17:41:29,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262424438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:29,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950649515] [2021-08-21 17:41:29,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:41:29,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:29,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:29,085 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 17:41:29,085 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 17:41:34,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:41:34,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:34,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:34,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:34,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950649515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:34,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:34,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:41:34,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837102856] [2021-08-21 17:41:34,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:41:34,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:41:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:41:34,724 INFO L87 Difference]: Start difference. First operand 21619 states and 35132 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:35,674 INFO L93 Difference]: Finished difference Result 21766 states and 35341 transitions. [2021-08-21 17:41:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:41:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:35,714 INFO L225 Difference]: With dead ends: 21766 [2021-08-21 17:41:35,715 INFO L226 Difference]: Without dead ends: 21760 [2021-08-21 17:41:35,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:41:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21760 states. [2021-08-21 17:41:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21760 to 21666. [2021-08-21 17:41:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21666 states, 21665 states have (on average 1.6254327255942764) internal successors, (35215), 21665 states have internal predecessors, (35215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21666 states to 21666 states and 35215 transitions. [2021-08-21 17:41:35,986 INFO L78 Accepts]: Start accepts. Automaton has 21666 states and 35215 transitions. Word has length 44 [2021-08-21 17:41:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:35,986 INFO L470 AbstractCegarLoop]: Abstraction has 21666 states and 35215 transitions. [2021-08-21 17:41:35,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 21666 states and 35215 transitions. [2021-08-21 17:41:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:36,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:36,004 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:36,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-21 17:41:36,204 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,SelfDestructingSolverStorable158 [2021-08-21 17:41:36,205 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 346318104, now seen corresponding path program 147 times [2021-08-21 17:41:36,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:36,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686601244] [2021-08-21 17:41:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:36,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:36,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:36,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686601244] [2021-08-21 17:41:36,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686601244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:36,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333602659] [2021-08-21 17:41:36,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:41:36,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:36,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:36,454 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 17:41:36,454 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 17:41:41,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:41:41,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:41,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:42,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333602659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:42,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:42,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:41:42,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044830161] [2021-08-21 17:41:42,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:41:42,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:41:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:41:42,191 INFO L87 Difference]: Start difference. First operand 21666 states and 35215 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:43,114 INFO L93 Difference]: Finished difference Result 21823 states and 35441 transitions. [2021-08-21 17:41:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:41:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:43,147 INFO L225 Difference]: With dead ends: 21823 [2021-08-21 17:41:43,147 INFO L226 Difference]: Without dead ends: 21817 [2021-08-21 17:41:43,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 649.1ms TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:41:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21817 states. [2021-08-21 17:41:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21817 to 21712. [2021-08-21 17:41:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21712 states, 21711 states have (on average 1.6257196812675603) internal successors, (35296), 21711 states have internal predecessors, (35296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21712 states to 21712 states and 35296 transitions. [2021-08-21 17:41:43,463 INFO L78 Accepts]: Start accepts. Automaton has 21712 states and 35296 transitions. Word has length 44 [2021-08-21 17:41:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:43,464 INFO L470 AbstractCegarLoop]: Abstraction has 21712 states and 35296 transitions. [2021-08-21 17:41:43,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:43,464 INFO L276 IsEmpty]: Start isEmpty. Operand 21712 states and 35296 transitions. [2021-08-21 17:41:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:43,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:43,481 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:43,512 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 17:41:43,681 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,SelfDestructingSolverStorable159 [2021-08-21 17:41:43,682 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:43,682 INFO L82 PathProgramCache]: Analyzing trace with hash -39690002, now seen corresponding path program 148 times [2021-08-21 17:41:43,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:43,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328273656] [2021-08-21 17:41:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:43,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:43,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:43,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328273656] [2021-08-21 17:41:43,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328273656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:43,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381057021] [2021-08-21 17:41:43,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:41:43,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:43,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:43,925 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 17:41:43,926 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 17:41:49,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:41:49,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:49,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381057021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:49,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:49,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:41:49,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836578092] [2021-08-21 17:41:49,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:41:49,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:49,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:41:49,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:41:49,710 INFO L87 Difference]: Start difference. First operand 21712 states and 35296 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:50,755 INFO L93 Difference]: Finished difference Result 22845 states and 37062 transitions. [2021-08-21 17:41:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:41:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:50,787 INFO L225 Difference]: With dead ends: 22845 [2021-08-21 17:41:50,788 INFO L226 Difference]: Without dead ends: 22833 [2021-08-21 17:41:50,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 727.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:41:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22833 states. [2021-08-21 17:41:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22833 to 21879. [2021-08-21 17:41:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21879 states, 21878 states have (on average 1.626839747691745) internal successors, (35592), 21878 states have internal predecessors, (35592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21879 states to 21879 states and 35592 transitions. [2021-08-21 17:41:51,075 INFO L78 Accepts]: Start accepts. Automaton has 21879 states and 35592 transitions. Word has length 44 [2021-08-21 17:41:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:51,075 INFO L470 AbstractCegarLoop]: Abstraction has 21879 states and 35592 transitions. [2021-08-21 17:41:51,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21879 states and 35592 transitions. [2021-08-21 17:41:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:51,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:51,093 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:51,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:51,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:51,294 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:51,294 INFO L82 PathProgramCache]: Analyzing trace with hash -819915744, now seen corresponding path program 149 times [2021-08-21 17:41:51,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:51,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75864367] [2021-08-21 17:41:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:51,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:51,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:51,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75864367] [2021-08-21 17:41:51,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75864367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:51,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665259857] [2021-08-21 17:41:51,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:41:51,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:51,599 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 17:41:51,600 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 17:41:56,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:41:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:41:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:57,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665259857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:57,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:57,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-21 17:41:57,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318332207] [2021-08-21 17:41:57,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:41:57,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:57,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:41:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:41:57,415 INFO L87 Difference]: Start difference. First operand 21879 states and 35592 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:58,044 INFO L93 Difference]: Finished difference Result 22062 states and 35870 transitions. [2021-08-21 17:41:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:41:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:41:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:58,080 INFO L225 Difference]: With dead ends: 22062 [2021-08-21 17:41:58,080 INFO L226 Difference]: Without dead ends: 22050 [2021-08-21 17:41:58,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:41:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22050 states. [2021-08-21 17:41:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22050 to 21974. [2021-08-21 17:41:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21974 states, 21973 states have (on average 1.6274973831520503) internal successors, (35761), 21973 states have internal predecessors, (35761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21974 states to 21974 states and 35761 transitions. [2021-08-21 17:41:58,362 INFO L78 Accepts]: Start accepts. Automaton has 21974 states and 35761 transitions. Word has length 44 [2021-08-21 17:41:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:58,362 INFO L470 AbstractCegarLoop]: Abstraction has 21974 states and 35761 transitions. [2021-08-21 17:41:58,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21974 states and 35761 transitions. [2021-08-21 17:41:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:41:58,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:58,380 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:58,411 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 17:41:58,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:58,581 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash -216415370, now seen corresponding path program 150 times [2021-08-21 17:41:58,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:58,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334657026] [2021-08-21 17:41:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:58,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:58,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:58,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334657026] [2021-08-21 17:41:58,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334657026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:58,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559922323] [2021-08-21 17:41:58,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:41:58,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:58,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:58,820 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 17:41:58,821 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 17:42:04,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:42:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:04,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559922323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:04,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:04,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-08-21 17:42:04,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586671603] [2021-08-21 17:42:04,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:42:04,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:42:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:42:04,833 INFO L87 Difference]: Start difference. First operand 21974 states and 35761 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:05,379 INFO L93 Difference]: Finished difference Result 22168 states and 36052 transitions. [2021-08-21 17:42:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:42:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:42:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:05,415 INFO L225 Difference]: With dead ends: 22168 [2021-08-21 17:42:05,415 INFO L226 Difference]: Without dead ends: 22156 [2021-08-21 17:42:05,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:42:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22156 states. [2021-08-21 17:42:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22156 to 22071. [2021-08-21 17:42:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22071 states, 22070 states have (on average 1.6281830539193476) internal successors, (35934), 22070 states have internal predecessors, (35934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22071 states to 22071 states and 35934 transitions. [2021-08-21 17:42:05,727 INFO L78 Accepts]: Start accepts. Automaton has 22071 states and 35934 transitions. Word has length 44 [2021-08-21 17:42:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:05,727 INFO L470 AbstractCegarLoop]: Abstraction has 22071 states and 35934 transitions. [2021-08-21 17:42:05,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 22071 states and 35934 transitions. [2021-08-21 17:42:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:42:05,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:05,745 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:05,776 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 17:42:05,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:05,946 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:05,946 INFO L82 PathProgramCache]: Analyzing trace with hash 404833248, now seen corresponding path program 151 times [2021-08-21 17:42:05,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:05,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538182985] [2021-08-21 17:42:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:05,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:06,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:06,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538182985] [2021-08-21 17:42:06,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538182985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:06,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394235171] [2021-08-21 17:42:06,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:06,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:06,237 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 17:42:06,238 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 17:42:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:11,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:12,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394235171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:12,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:12,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 17:42:12,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568775593] [2021-08-21 17:42:12,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:42:12,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:12,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:42:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:42:12,425 INFO L87 Difference]: Start difference. First operand 22071 states and 35934 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:13,111 INFO L93 Difference]: Finished difference Result 24363 states and 39504 transitions. [2021-08-21 17:42:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:42:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:42:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:13,150 INFO L225 Difference]: With dead ends: 24363 [2021-08-21 17:42:13,151 INFO L226 Difference]: Without dead ends: 24345 [2021-08-21 17:42:13,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 593.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:42:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24345 states. [2021-08-21 17:42:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24345 to 22989. [2021-08-21 17:42:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22989 states, 22988 states have (on average 1.6339829476248477) internal successors, (37562), 22988 states have internal predecessors, (37562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22989 states to 22989 states and 37562 transitions. [2021-08-21 17:42:13,470 INFO L78 Accepts]: Start accepts. Automaton has 22989 states and 37562 transitions. Word has length 44 [2021-08-21 17:42:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:13,470 INFO L470 AbstractCegarLoop]: Abstraction has 22989 states and 37562 transitions. [2021-08-21 17:42:13,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 22989 states and 37562 transitions. [2021-08-21 17:42:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:42:13,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:13,490 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:13,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-21 17:42:13,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:13,690 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1459546004, now seen corresponding path program 152 times [2021-08-21 17:42:13,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:13,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97120550] [2021-08-21 17:42:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:13,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:13,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:13,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97120550] [2021-08-21 17:42:13,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97120550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:13,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602046154] [2021-08-21 17:42:13,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:13,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:13,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:13,943 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 17:42:13,943 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 17:42:19,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:19,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:19,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:19,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602046154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:19,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:19,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:42:19,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232091965] [2021-08-21 17:42:19,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:42:19,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:42:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:42:19,957 INFO L87 Difference]: Start difference. First operand 22989 states and 37562 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:20,960 INFO L93 Difference]: Finished difference Result 23683 states and 38606 transitions. [2021-08-21 17:42:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:42:20,960 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:42:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:20,998 INFO L225 Difference]: With dead ends: 23683 [2021-08-21 17:42:20,998 INFO L226 Difference]: Without dead ends: 23677 [2021-08-21 17:42:20,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 800.3ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:42:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23677 states. [2021-08-21 17:42:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23677 to 23030. [2021-08-21 17:42:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23030 states, 23029 states have (on average 1.6343306266012418) internal successors, (37637), 23029 states have internal predecessors, (37637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23030 states to 23030 states and 37637 transitions. [2021-08-21 17:42:21,314 INFO L78 Accepts]: Start accepts. Automaton has 23030 states and 37637 transitions. Word has length 44 [2021-08-21 17:42:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:21,314 INFO L470 AbstractCegarLoop]: Abstraction has 23030 states and 37637 transitions. [2021-08-21 17:42:21,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 23030 states and 37637 transitions. [2021-08-21 17:42:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:42:21,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:21,334 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:21,366 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 17:42:21,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:21,535 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash 41200234, now seen corresponding path program 153 times [2021-08-21 17:42:21,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:21,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146307526] [2021-08-21 17:42:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:21,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:21,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:21,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146307526] [2021-08-21 17:42:21,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146307526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:21,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530118253] [2021-08-21 17:42:21,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:21,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:21,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:21,788 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 17:42:21,788 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 17:42:27,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:42:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530118253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:27,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:27,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:42:27,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892838175] [2021-08-21 17:42:27,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:42:27,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:42:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:42:27,738 INFO L87 Difference]: Start difference. First operand 23030 states and 37637 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:28,642 INFO L93 Difference]: Finished difference Result 23165 states and 37829 transitions. [2021-08-21 17:42:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:42:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:42:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:28,676 INFO L225 Difference]: With dead ends: 23165 [2021-08-21 17:42:28,676 INFO L226 Difference]: Without dead ends: 23159 [2021-08-21 17:42:28,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:42:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23159 states. [2021-08-21 17:42:28,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23159 to 23077. [2021-08-21 17:42:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23077 states, 23076 states have (on average 1.6345987172820247) internal successors, (37720), 23076 states have internal predecessors, (37720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23077 states to 23077 states and 37720 transitions. [2021-08-21 17:42:28,963 INFO L78 Accepts]: Start accepts. Automaton has 23077 states and 37720 transitions. Word has length 44 [2021-08-21 17:42:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:28,964 INFO L470 AbstractCegarLoop]: Abstraction has 23077 states and 37720 transitions. [2021-08-21 17:42:28,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 23077 states and 37720 transitions. [2021-08-21 17:42:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:42:28,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:28,981 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:29,014 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 17:42:29,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:29,185 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash 721261746, now seen corresponding path program 154 times [2021-08-21 17:42:29,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:29,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430198434] [2021-08-21 17:42:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:29,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:29,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:29,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430198434] [2021-08-21 17:42:29,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430198434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:29,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639192824] [2021-08-21 17:42:29,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:29,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:29,429 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 17:42:29,431 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 17:42:34,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:34,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:34,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:35,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639192824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:35,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:35,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:42:35,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340594022] [2021-08-21 17:42:35,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:42:35,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:42:35,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:42:35,440 INFO L87 Difference]: Start difference. First operand 23077 states and 37720 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:36,381 INFO L93 Difference]: Finished difference Result 23218 states and 37921 transitions. [2021-08-21 17:42:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:42:36,382 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:42:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:36,416 INFO L225 Difference]: With dead ends: 23218 [2021-08-21 17:42:36,416 INFO L226 Difference]: Without dead ends: 23212 [2021-08-21 17:42:36,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:42:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23212 states. [2021-08-21 17:42:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23212 to 23121. [2021-08-21 17:42:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23121 states, 23120 states have (on average 1.6349048442906575) internal successors, (37799), 23120 states have internal predecessors, (37799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23121 states to 23121 states and 37799 transitions. [2021-08-21 17:42:36,730 INFO L78 Accepts]: Start accepts. Automaton has 23121 states and 37799 transitions. Word has length 44 [2021-08-21 17:42:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:36,730 INFO L470 AbstractCegarLoop]: Abstraction has 23121 states and 37799 transitions. [2021-08-21 17:42:36,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23121 states and 37799 transitions. [2021-08-21 17:42:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:42:36,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:36,750 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:36,782 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 17:42:36,951 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,SelfDestructingSolverStorable166 [2021-08-21 17:42:36,951 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1022454484, now seen corresponding path program 155 times [2021-08-21 17:42:36,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:36,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590174689] [2021-08-21 17:42:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:36,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:37,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:37,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590174689] [2021-08-21 17:42:37,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590174689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:37,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485347422] [2021-08-21 17:42:37,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:42:37,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:37,219 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 17:42:37,220 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 17:42:42,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:42:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:43,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485347422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:43,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:43,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-21 17:42:43,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912281664] [2021-08-21 17:42:43,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:42:43,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:43,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:42:43,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:42:43,384 INFO L87 Difference]: Start difference. First operand 23121 states and 37799 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:44,271 INFO L93 Difference]: Finished difference Result 23263 states and 38000 transitions. [2021-08-21 17:42:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:42:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:42:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:44,308 INFO L225 Difference]: With dead ends: 23263 [2021-08-21 17:42:44,308 INFO L226 Difference]: Without dead ends: 23257 [2021-08-21 17:42:44,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:42:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23257 states. [2021-08-21 17:42:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23257 to 23165. [2021-08-21 17:42:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23165 states, 23164 states have (on average 1.6352098083232602) internal successors, (37878), 23164 states have internal predecessors, (37878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23165 states to 23165 states and 37878 transitions. [2021-08-21 17:42:44,623 INFO L78 Accepts]: Start accepts. Automaton has 23165 states and 37878 transitions. Word has length 44 [2021-08-21 17:42:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:44,623 INFO L470 AbstractCegarLoop]: Abstraction has 23165 states and 37878 transitions. [2021-08-21 17:42:44,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 23165 states and 37878 transitions. [2021-08-21 17:42:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:42:44,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:44,643 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:44,675 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 17:42:44,843 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,SelfDestructingSolverStorable167 [2021-08-21 17:42:44,844 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:44,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1292409948, now seen corresponding path program 156 times [2021-08-21 17:42:44,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:44,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287189263] [2021-08-21 17:42:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:44,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:45,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:45,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287189263] [2021-08-21 17:42:45,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287189263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:45,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729742573] [2021-08-21 17:42:45,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:42:45,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:45,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:45,141 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 17:42:45,142 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 17:42:50,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:42:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:51,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729742573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:51,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:51,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-21 17:42:51,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169867000] [2021-08-21 17:42:51,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:42:51,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:42:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:42:51,308 INFO L87 Difference]: Start difference. First operand 23165 states and 37878 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:52,146 INFO L93 Difference]: Finished difference Result 23272 states and 38033 transitions. [2021-08-21 17:42:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:42:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:42:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:52,183 INFO L225 Difference]: With dead ends: 23272 [2021-08-21 17:42:52,183 INFO L226 Difference]: Without dead ends: 23266 [2021-08-21 17:42:52,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 713.7ms TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:42:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23266 states. [2021-08-21 17:42:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23266 to 23203. [2021-08-21 17:42:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23203 states, 23202 states have (on average 1.6355486595983104) internal successors, (37948), 23202 states have internal predecessors, (37948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23203 states to 23203 states and 37948 transitions. [2021-08-21 17:42:52,523 INFO L78 Accepts]: Start accepts. Automaton has 23203 states and 37948 transitions. Word has length 44 [2021-08-21 17:42:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:52,523 INFO L470 AbstractCegarLoop]: Abstraction has 23203 states and 37948 transitions. [2021-08-21 17:42:52,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 23203 states and 37948 transitions. [2021-08-21 17:42:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:42:52,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:52,543 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:52,574 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 17:42:52,743 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,SelfDestructingSolverStorable168 [2021-08-21 17:42:52,743 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:52,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1194074190, now seen corresponding path program 157 times [2021-08-21 17:42:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:52,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940270499] [2021-08-21 17:42:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:52,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:53,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:53,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940270499] [2021-08-21 17:42:53,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940270499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:53,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417175524] [2021-08-21 17:42:53,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:53,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:53,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:53,037 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 17:42:53,037 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 17:42:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:42:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:42:59,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417175524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:59,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:59,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-21 17:42:59,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105657825] [2021-08-21 17:42:59,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:42:59,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:42:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:42:59,229 INFO L87 Difference]: Start difference. First operand 23203 states and 37948 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:00,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:00,259 INFO L93 Difference]: Finished difference Result 23314 states and 38109 transitions. [2021-08-21 17:43:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:43:00,260 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:43:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:00,295 INFO L225 Difference]: With dead ends: 23314 [2021-08-21 17:43:00,295 INFO L226 Difference]: Without dead ends: 23308 [2021-08-21 17:43:00,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 791.4ms TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:43:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23308 states. [2021-08-21 17:43:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23308 to 23244. [2021-08-21 17:43:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23244 states, 23243 states have (on average 1.635976423009078) internal successors, (38025), 23243 states have internal predecessors, (38025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23244 states to 23244 states and 38025 transitions. [2021-08-21 17:43:00,599 INFO L78 Accepts]: Start accepts. Automaton has 23244 states and 38025 transitions. Word has length 44 [2021-08-21 17:43:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:00,599 INFO L470 AbstractCegarLoop]: Abstraction has 23244 states and 38025 transitions. [2021-08-21 17:43:00,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23244 states and 38025 transitions. [2021-08-21 17:43:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:43:00,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:00,680 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:00,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-21 17:43:00,880 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,SelfDestructingSolverStorable169 [2021-08-21 17:43:00,881 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1160858652, now seen corresponding path program 158 times [2021-08-21 17:43:00,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:00,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184024596] [2021-08-21 17:43:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:00,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:01,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:01,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184024596] [2021-08-21 17:43:01,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184024596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:01,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517287651] [2021-08-21 17:43:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:01,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:01,169 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 17:43:01,170 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 17:43:06,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:06,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:06,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:43:06,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517287651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:07,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:07,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-21 17:43:07,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054883420] [2021-08-21 17:43:07,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:43:07,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:43:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:43:07,387 INFO L87 Difference]: Start difference. First operand 23244 states and 38025 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-21 17:43:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:43:08,005 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:43:08,026 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 17:43:08,026 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 17:43:08,036 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 17:43:08,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:08,205 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (23244states) and FLOYD_HOARE automaton (currently 19 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. [2021-08-21 17:43:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:43:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:43:08,210 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:43:08,210 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:43:08,212 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:43:08 BasicIcfg [2021-08-21 17:43:08,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:43:08,213 INFO L168 Benchmark]: Toolchain (without parser) took 702565.22 ms. Allocated memory was 186.6 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 167.3 MB in the beginning and 563.5 MB in the end (delta: -396.2 MB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-21 17:43:08,213 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:43:08,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.59 ms. Allocated memory is still 186.6 MB. Free memory was 167.3 MB in the beginning and 165.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:43:08,214 INFO L168 Benchmark]: Boogie Preprocessor took 13.73 ms. Allocated memory is still 186.6 MB. Free memory was 165.8 MB in the beginning and 164.9 MB in the end (delta: 944.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:43:08,214 INFO L168 Benchmark]: RCFGBuilder took 226.39 ms. Allocated memory is still 186.6 MB. Free memory was 164.9 MB in the beginning and 153.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-21 17:43:08,214 INFO L168 Benchmark]: TraceAbstraction took 702297.64 ms. Allocated memory was 186.6 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 153.3 MB in the beginning and 563.5 MB in the end (delta: -410.2 MB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-21 17:43:08,215 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 0.14 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.59 ms. Allocated memory is still 186.6 MB. Free memory was 167.3 MB in the beginning and 165.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.73 ms. Allocated memory is still 186.6 MB. Free memory was 165.8 MB in the beginning and 164.9 MB in the end (delta: 944.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 226.39 ms. Allocated memory is still 186.6 MB. Free memory was 164.9 MB in the beginning and 153.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 702297.64 ms. Allocated memory was 186.6 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 153.3 MB in the beginning and 563.5 MB in the end (delta: -410.2 MB). Peak memory consumption was 2.5 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: 71, positive: 59, positive conditional: 59, positive unconditional: 0, negative: 12, negative conditional: 12, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 59, positive: 59, positive conditional: 0, positive unconditional: 59, 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: 59, positive: 59, positive conditional: 0, positive unconditional: 59, 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: 59, positive: 59, positive conditional: 0, positive unconditional: 59, 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: 59, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 59, unknown conditional: 0, unknown unconditional: 59] , Statistics on independence cache: Total cache size (in pairs): 59, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 12 - 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: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (23244states) and FLOYD_HOARE automaton (currently 19 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (23244states) and FLOYD_HOARE automaton (currently 19 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (23244states) and FLOYD_HOARE automaton (currently 19 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 702203.4ms, OverallIterations: 171, TraceHistogramMax: 6, EmptinessCheckTime: 1268.6ms, AutomataDifference: 128822.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 85.9ms, PartialOrderReductionTime: 56.8ms, HoareTripleCheckerStatistics: 9102 SDtfs, 20085 SDslu, 100297 SDs, 0 SdLazy, 148005 SolverSat, 4060 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 55375.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10225 GetRequests, 4561 SyntacticMatches, 339 SemanticMatches, 5324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37910 ImplicationChecksByTransitivity, 99177.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23244occurred in iteration=170, InterpolantAutomatonStates: 4229, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20064.9ms AutomataMinimizationTime, 170 MinimizatonAttempts, 67513 StatesRemovedByMinimization, 170 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 504.5ms SsaConstructionTime, 2407.0ms SatisfiabilityAnalysisTime, 106933.4ms InterpolantComputationTime, 12280 NumberOfCodeBlocks, 12244 NumberOfCodeBlocksAsserted, 700 NumberOfCheckSat, 11941 ConstructedInterpolants, 0 QuantifiedInterpolants, 148768 SizeOfPredicates, 741 NumberOfNonLiveVariables, 11407 ConjunctsInSsa, 3339 ConjunctsInUnsatCore, 339 InterpolantComputations, 3 PerfectInterpolantSequences, 969/11814 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