/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:46:42,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:46:42,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:46:42,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:46:42,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:46:42,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:46:42,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:46:42,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:46:42,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:46:42,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:46:42,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:46:42,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:46:42,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:46:42,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:46:42,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:46:42,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:46:42,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:46:42,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:46:42,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:46:42,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:46:42,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:46:42,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:46:42,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:46:42,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:46:42,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 18:46:42,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 18:46:42,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 18:46:42,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 18:46:42,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 18:46:42,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 18:46:42,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:46:42,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:46:42,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:46:42,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:46:42,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:46:42,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:46:42,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:46:42,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:46:42,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:46:42,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:46:42,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:46:42,112 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 18:46:42,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:46:42,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:46:42,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:46:42,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:46:42,138 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:46:42,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:46:42,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:46:42,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:46:42,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:46:42,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:46:42,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:46:42,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:46:42,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:46:42,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:46:42,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:46:42,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:46:42,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:46:42,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:46:42,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:46:42,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:46:42,141 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:46:42,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:46:42,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:46:42,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:46:42,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:46:42,400 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:46:42,401 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:46:42,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2021-08-21 18:46:42,402 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2021-08-21 18:46:42,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:46:42,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:46:42,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:46:42,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:46:42,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:46:42,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:46:42,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:46:42,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:46:42,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:46:42,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:46:42,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:46:42,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:46:42,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:46:42,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/1) ... [2021-08-21 18:46:42,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:46:42,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:42,485 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 18:46:42,509 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 18:46:42,523 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:46:42,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:46:42,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:46:42,523 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:46:42,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:46:42,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:46:42,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:46:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:46:42,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:46:42,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:46:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:46:42,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:46:42,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 18:46:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 18:46:42,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 18:46:42,525 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 18:46:42,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:46:42,700 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:46:42,701 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:46:42 BoogieIcfgContainer [2021-08-21 18:46:42,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:46:42,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:46:42,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:46:42,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:46:42,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:42" (1/2) ... [2021-08-21 18:46:42,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b61e88 and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:46:42, skipping insertion in model container [2021-08-21 18:46:42,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:46:42" (2/2) ... [2021-08-21 18:46:42,706 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-08-21 18:46:42,709 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:46:42,709 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:46:42,709 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:46:42,709 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:46:42,761 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 18:46:42,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:46:42,812 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 18:46:42,812 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 18:46:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 298 states have (on average 1.8187919463087248) internal successors, (542), 430 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:46:42,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:42,990 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] [2021-08-21 18:46:42,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1128885371, now seen corresponding path program 1 times [2021-08-21 18:46:43,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:43,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009883119] [2021-08-21 18:46:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:43,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:43,157 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 18:46:43,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:43,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009883119] [2021-08-21 18:46:43,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009883119] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:46:43,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:46:43,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:46:43,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302801190] [2021-08-21 18:46:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:46:43,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:46:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:46:43,177 INFO L87 Difference]: Start difference. First operand has 431 states, 298 states have (on average 1.8187919463087248) internal successors, (542), 430 states have internal predecessors, (542), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:43,224 INFO L93 Difference]: Finished difference Result 856 states and 1002 transitions. [2021-08-21 18:46:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:46:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 18:46:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:43,236 INFO L225 Difference]: With dead ends: 856 [2021-08-21 18:46:43,236 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 18:46:43,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:46:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 18:46:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-08-21 18:46:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.6770833333333333) internal successors, (161), 96 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 161 transitions. [2021-08-21 18:46:43,259 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 161 transitions. Word has length 21 [2021-08-21 18:46:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:43,260 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 161 transitions. [2021-08-21 18:46:43,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 161 transitions. [2021-08-21 18:46:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:46:43,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:43,261 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, 1] [2021-08-21 18:46:43,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:46:43,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:43,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1126634887, now seen corresponding path program 1 times [2021-08-21 18:46:43,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:43,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850809163] [2021-08-21 18:46:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:43,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:43,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:43,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850809163] [2021-08-21 18:46:43,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850809163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:43,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379641820] [2021-08-21 18:46:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:43,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:43,339 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 18:46:43,345 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 18:46:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:46:43,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:43,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379641820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:43,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:43,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-21 18:46:43,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564014424] [2021-08-21 18:46:43,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:46:43,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:46:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:46:43,567 INFO L87 Difference]: Start difference. First operand 97 states and 161 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:43,638 INFO L93 Difference]: Finished difference Result 202 states and 347 transitions. [2021-08-21 18:46:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:46:43,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:46:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:43,644 INFO L225 Difference]: With dead ends: 202 [2021-08-21 18:46:43,645 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 18:46:43,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:46:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 18:46:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-08-21 18:46:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.782258064516129) internal successors, (221), 124 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 221 transitions. [2021-08-21 18:46:43,656 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 221 transitions. Word has length 23 [2021-08-21 18:46:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:43,656 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 221 transitions. [2021-08-21 18:46:43,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 221 transitions. [2021-08-21 18:46:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:46:43,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:43,657 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, 1] [2021-08-21 18:46:43,675 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 18:46:43,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:43,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:43,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1287000701, now seen corresponding path program 1 times [2021-08-21 18:46:43,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:43,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815621312] [2021-08-21 18:46:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:43,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:43,916 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 18:46:43,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:43,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815621312] [2021-08-21 18:46:43,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815621312] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:46:43,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:46:43,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:46:43,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784696297] [2021-08-21 18:46:43,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:46:43,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:46:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:46:43,920 INFO L87 Difference]: Start difference. First operand 125 states and 221 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:43,938 INFO L93 Difference]: Finished difference Result 124 states and 214 transitions. [2021-08-21 18:46:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:46:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:46:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:43,940 INFO L225 Difference]: With dead ends: 124 [2021-08-21 18:46:43,940 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 18:46:43,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:46:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 18:46:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-08-21 18:46:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.8125) internal successors, (203), 112 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 18:46:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 203 transitions. [2021-08-21 18:46:43,947 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 203 transitions. Word has length 23 [2021-08-21 18:46:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:43,948 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 203 transitions. [2021-08-21 18:46:43,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 203 transitions. [2021-08-21 18:46:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:46:43,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:43,949 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, 1] [2021-08-21 18:46:43,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:46:43,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash -714292611, now seen corresponding path program 2 times [2021-08-21 18:46:43,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:43,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533397357] [2021-08-21 18:46:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:43,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:43,996 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 18:46:43,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:43,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533397357] [2021-08-21 18:46:43,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533397357] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:46:43,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:46:43,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:46:43,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259485324] [2021-08-21 18:46:43,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:46:43,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:46:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:46:43,998 INFO L87 Difference]: Start difference. First operand 113 states and 203 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:44,019 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2021-08-21 18:46:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:46:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:46:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:44,020 INFO L225 Difference]: With dead ends: 148 [2021-08-21 18:46:44,020 INFO L226 Difference]: Without dead ends: 148 [2021-08-21 18:46:44,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:46:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-21 18:46:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2021-08-21 18:46:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.814516129032258) internal successors, (225), 124 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 225 transitions. [2021-08-21 18:46:44,030 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 225 transitions. Word has length 23 [2021-08-21 18:46:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:44,030 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 225 transitions. [2021-08-21 18:46:44,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 225 transitions. [2021-08-21 18:46:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:46:44,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:44,031 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, 1, 1, 1] [2021-08-21 18:46:44,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:46:44,032 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash -995516293, now seen corresponding path program 1 times [2021-08-21 18:46:44,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:44,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094476586] [2021-08-21 18:46:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:44,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:44,113 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 18:46:44,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:44,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094476586] [2021-08-21 18:46:44,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094476586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:44,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008040946] [2021-08-21 18:46:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:44,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:44,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:44,115 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 18:46:44,116 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 18:46:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:44,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:46:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:44,273 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 18:46:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008040946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:44,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:44,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-21 18:46:44,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638437314] [2021-08-21 18:46:44,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:46:44,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:46:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:46:44,277 INFO L87 Difference]: Start difference. First operand 125 states and 225 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 18:46:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:44,317 INFO L93 Difference]: Finished difference Result 198 states and 360 transitions. [2021-08-21 18:46:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:46:44,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 25 [2021-08-21 18:46:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:44,319 INFO L225 Difference]: With dead ends: 198 [2021-08-21 18:46:44,319 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 18:46:44,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:46:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 18:46:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2021-08-21 18:46:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.9430379746835442) internal successors, (307), 158 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 307 transitions. [2021-08-21 18:46:44,325 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 307 transitions. Word has length 25 [2021-08-21 18:46:44,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:44,325 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 307 transitions. [2021-08-21 18:46:44,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 18:46:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 307 transitions. [2021-08-21 18:46:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:46:44,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:44,326 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, 1, 1, 1, 1, 1] [2021-08-21 18:46:44,345 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 18:46:44,540 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 18:46:44,541 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash -153532803, now seen corresponding path program 1 times [2021-08-21 18:46:44,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:44,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862644818] [2021-08-21 18:46:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:44,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:44,661 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 18:46:44,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:44,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862644818] [2021-08-21 18:46:44,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862644818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:44,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175330642] [2021-08-21 18:46:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:44,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:44,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:44,673 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 18:46:44,695 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 18:46:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:46:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:46:44,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175330642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:44,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:44,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-08-21 18:46:44,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54044835] [2021-08-21 18:46:44,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:46:44,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:46:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:46:44,847 INFO L87 Difference]: Start difference. First operand 159 states and 307 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 18:46:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:44,904 INFO L93 Difference]: Finished difference Result 278 states and 541 transitions. [2021-08-21 18:46:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:46:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 27 [2021-08-21 18:46:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:44,907 INFO L225 Difference]: With dead ends: 278 [2021-08-21 18:46:44,907 INFO L226 Difference]: Without dead ends: 278 [2021-08-21 18:46:44,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:46:44,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-21 18:46:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 209. [2021-08-21 18:46:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1923076923076925) internal successors, (456), 208 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 456 transitions. [2021-08-21 18:46:44,924 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 456 transitions. Word has length 27 [2021-08-21 18:46:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:44,924 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 456 transitions. [2021-08-21 18:46:44,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 18:46:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 456 transitions. [2021-08-21 18:46:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:46:44,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:44,925 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:44,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:45,125 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 18:46:45,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash -428792705, now seen corresponding path program 1 times [2021-08-21 18:46:45,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:45,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051022410] [2021-08-21 18:46:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:45,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:45,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:45,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051022410] [2021-08-21 18:46:45,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051022410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:46:45,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:46:45,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:46:45,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504624418] [2021-08-21 18:46:45,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:46:45,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:46:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:46:45,174 INFO L87 Difference]: Start difference. First operand 209 states and 456 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 18:46:45,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:45,229 INFO L93 Difference]: Finished difference Result 628 states and 1272 transitions. [2021-08-21 18:46:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:46:45,230 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 29 [2021-08-21 18:46:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:45,232 INFO L225 Difference]: With dead ends: 628 [2021-08-21 18:46:45,232 INFO L226 Difference]: Without dead ends: 568 [2021-08-21 18:46:45,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:46:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-21 18:46:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 452. [2021-08-21 18:46:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.1929046563192904) internal successors, (989), 451 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 989 transitions. [2021-08-21 18:46:45,242 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 989 transitions. Word has length 29 [2021-08-21 18:46:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:45,242 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 989 transitions. [2021-08-21 18:46:45,242 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 18:46:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 989 transitions. [2021-08-21 18:46:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:46:45,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:45,243 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:45,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:46:45,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash -837757825, now seen corresponding path program 2 times [2021-08-21 18:46:45,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:45,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383877835] [2021-08-21 18:46:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:45,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:45,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:45,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383877835] [2021-08-21 18:46:45,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383877835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:45,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158240174] [2021-08-21 18:46:45,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:45,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:45,320 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 18:46:45,322 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 18:46:45,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:45,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:46:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:46:45,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158240174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:45,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:45,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-21 18:46:45,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136495100] [2021-08-21 18:46:45,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:46:45,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:45,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:46:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:46:45,600 INFO L87 Difference]: Start difference. First operand 452 states and 989 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) 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 18:46:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:45,650 INFO L93 Difference]: Finished difference Result 536 states and 1128 transitions. [2021-08-21 18:46:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:46:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) 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 29 [2021-08-21 18:46:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:45,652 INFO L225 Difference]: With dead ends: 536 [2021-08-21 18:46:45,652 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 18:46:45,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:46:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 18:46:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 430. [2021-08-21 18:46:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.1888111888111887) internal successors, (939), 429 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 939 transitions. [2021-08-21 18:46:45,663 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 939 transitions. Word has length 29 [2021-08-21 18:46:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:45,663 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 939 transitions. [2021-08-21 18:46:45,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) 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 18:46:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 939 transitions. [2021-08-21 18:46:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:46:45,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:45,664 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:45,682 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 18:46:45,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:45,873 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash 943396411, now seen corresponding path program 3 times [2021-08-21 18:46:45,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:45,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406182381] [2021-08-21 18:46:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:45,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:45,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:45,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406182381] [2021-08-21 18:46:45,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406182381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:45,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835645118] [2021-08-21 18:46:45,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:45,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:45,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:45,943 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 18:46:45,944 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 18:46:46,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:46:46,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:46,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:46:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:46,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835645118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:46,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:46,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-21 18:46:46,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907811995] [2021-08-21 18:46:46,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:46:46,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:46,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:46:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:46:46,201 INFO L87 Difference]: Start difference. First operand 430 states and 939 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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 18:46:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:46,295 INFO L93 Difference]: Finished difference Result 1072 states and 2233 transitions. [2021-08-21 18:46:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:46:46,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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 29 [2021-08-21 18:46:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:46,299 INFO L225 Difference]: With dead ends: 1072 [2021-08-21 18:46:46,299 INFO L226 Difference]: Without dead ends: 1000 [2021-08-21 18:46:46,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:46:46,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-08-21 18:46:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 604. [2021-08-21 18:46:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.2238805970149254) internal successors, (1341), 603 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1341 transitions. [2021-08-21 18:46:46,312 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1341 transitions. Word has length 29 [2021-08-21 18:46:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:46,312 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1341 transitions. [2021-08-21 18:46:46,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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 18:46:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1341 transitions. [2021-08-21 18:46:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:46:46,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:46,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 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 18:46:46,334 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 18:46:46,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:46,525 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash -417741699, now seen corresponding path program 4 times [2021-08-21 18:46:46,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:46,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973553126] [2021-08-21 18:46:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:46,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:46,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:46,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973553126] [2021-08-21 18:46:46,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973553126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:46,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232123307] [2021-08-21 18:46:46,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:46:46,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:46,582 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 18:46:46,583 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 18:46:46,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:46,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:46,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:46,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:46,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232123307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:46,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:46,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-21 18:46:46,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495285852] [2021-08-21 18:46:46,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:46:46,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:46,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:46:46,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:46,802 INFO L87 Difference]: Start difference. First operand 604 states and 1341 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 18:46:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:46,925 INFO L93 Difference]: Finished difference Result 2213 states and 4865 transitions. [2021-08-21 18:46:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:46:46,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 31 [2021-08-21 18:46:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:46,933 INFO L225 Difference]: With dead ends: 2213 [2021-08-21 18:46:46,933 INFO L226 Difference]: Without dead ends: 2213 [2021-08-21 18:46:46,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:46:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-08-21 18:46:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 933. [2021-08-21 18:46:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.25) internal successors, (2097), 932 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2097 transitions. [2021-08-21 18:46:46,954 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2097 transitions. Word has length 31 [2021-08-21 18:46:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:46,954 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 2097 transitions. [2021-08-21 18:46:46,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 18:46:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2097 transitions. [2021-08-21 18:46:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:46:46,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:46,956 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 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 18:46:46,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 18:46:47,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:47,173 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1128499585, now seen corresponding path program 5 times [2021-08-21 18:46:47,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:47,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256519831] [2021-08-21 18:46:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:47,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:47,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:47,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256519831] [2021-08-21 18:46:47,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256519831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:47,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914344396] [2021-08-21 18:46:47,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:47,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:47,231 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 18:46:47,232 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 18:46:47,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:46:47,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:47,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914344396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:47,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:47,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 18:46:47,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602478828] [2021-08-21 18:46:47,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:46:47,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:46:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:46:47,483 INFO L87 Difference]: Start difference. First operand 933 states and 2097 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 18:46:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:47,564 INFO L93 Difference]: Finished difference Result 1966 states and 4184 transitions. [2021-08-21 18:46:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:46:47,565 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 31 [2021-08-21 18:46:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:47,571 INFO L225 Difference]: With dead ends: 1966 [2021-08-21 18:46:47,571 INFO L226 Difference]: Without dead ends: 1838 [2021-08-21 18:46:47,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:46:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-08-21 18:46:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1628. [2021-08-21 18:46:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.2476951444376154) internal successors, (3657), 1627 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3657 transitions. [2021-08-21 18:46:47,599 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3657 transitions. Word has length 31 [2021-08-21 18:46:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:47,599 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 3657 transitions. [2021-08-21 18:46:47,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 18:46:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3657 transitions. [2021-08-21 18:46:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:46:47,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:47,602 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 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 18:46:47,619 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 18:46:47,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:47,819 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:47,819 INFO L82 PathProgramCache]: Analyzing trace with hash 51337601, now seen corresponding path program 6 times [2021-08-21 18:46:47,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:47,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749771248] [2021-08-21 18:46:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:47,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:47,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:47,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749771248] [2021-08-21 18:46:47,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749771248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:47,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046915372] [2021-08-21 18:46:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:47,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:47,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:47,874 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 18:46:47,882 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 18:46:48,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:46:48,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:46:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:48,148 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 18:46:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046915372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:48,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:48,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 18:46:48,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997733831] [2021-08-21 18:46:48,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:46:48,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:46:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:46:48,150 INFO L87 Difference]: Start difference. First operand 1628 states and 3657 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 18:46:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:48,553 INFO L93 Difference]: Finished difference Result 4030 states and 8295 transitions. [2021-08-21 18:46:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:46:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 31 [2021-08-21 18:46:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:48,566 INFO L225 Difference]: With dead ends: 4030 [2021-08-21 18:46:48,567 INFO L226 Difference]: Without dead ends: 3974 [2021-08-21 18:46:48,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:46:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-08-21 18:46:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 2332. [2021-08-21 18:46:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.290862290862291) internal successors, (5340), 2331 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 5340 transitions. [2021-08-21 18:46:48,617 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 5340 transitions. Word has length 31 [2021-08-21 18:46:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:48,618 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 5340 transitions. [2021-08-21 18:46:48,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 18:46:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 5340 transitions. [2021-08-21 18:46:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:46:48,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:48,622 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 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 18:46:48,643 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 18:46:48,837 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,SelfDestructingSolverStorable11 [2021-08-21 18:46:48,837 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 765668793, now seen corresponding path program 7 times [2021-08-21 18:46:48,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:48,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874112671] [2021-08-21 18:46:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:48,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:48,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:48,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874112671] [2021-08-21 18:46:48,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874112671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:48,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60692650] [2021-08-21 18:46:48,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:46:48,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:48,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:48,898 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 18:46:48,899 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 18:46:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:49,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60692650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:49,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:49,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-21 18:46:49,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985118275] [2021-08-21 18:46:49,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:46:49,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:46:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:46:49,184 INFO L87 Difference]: Start difference. First operand 2332 states and 5340 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 18:46:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:49,249 INFO L93 Difference]: Finished difference Result 4816 states and 10712 transitions. [2021-08-21 18:46:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:46:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 31 [2021-08-21 18:46:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:49,264 INFO L225 Difference]: With dead ends: 4816 [2021-08-21 18:46:49,264 INFO L226 Difference]: Without dead ends: 4796 [2021-08-21 18:46:49,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:46:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2021-08-21 18:46:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 3249. [2021-08-21 18:46:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 3248 states have (on average 2.3158866995073892) internal successors, (7522), 3248 states have internal predecessors, (7522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 7522 transitions. [2021-08-21 18:46:49,333 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 7522 transitions. Word has length 31 [2021-08-21 18:46:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:49,333 INFO L470 AbstractCegarLoop]: Abstraction has 3249 states and 7522 transitions. [2021-08-21 18:46:49,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 18:46:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 7522 transitions. [2021-08-21 18:46:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:46:49,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:49,339 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 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 18:46:49,358 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 18:46:49,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:46:49,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash -253764419, now seen corresponding path program 8 times [2021-08-21 18:46:49,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:49,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98614341] [2021-08-21 18:46:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:49,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:49,629 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 18:46:49,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:49,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98614341] [2021-08-21 18:46:49,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98614341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:49,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681475312] [2021-08-21 18:46:49,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:49,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:49,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:49,630 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 18:46:49,644 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 18:46:49,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:49,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:46:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:49,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681475312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:49,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:49,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 18:46:49,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873858882] [2021-08-21 18:46:49,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:49,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:49,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:49,940 INFO L87 Difference]: Start difference. First operand 3249 states and 7522 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 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 18:46:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:50,550 INFO L93 Difference]: Finished difference Result 7083 states and 15306 transitions. [2021-08-21 18:46:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:46:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 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 31 [2021-08-21 18:46:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:50,573 INFO L225 Difference]: With dead ends: 7083 [2021-08-21 18:46:50,573 INFO L226 Difference]: Without dead ends: 6961 [2021-08-21 18:46:50,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=340, Invalid=1220, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:46:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-08-21 18:46:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 3759. [2021-08-21 18:46:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.3147951037786054) internal successors, (8699), 3758 states have internal predecessors, (8699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 8699 transitions. [2021-08-21 18:46:50,663 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 8699 transitions. Word has length 31 [2021-08-21 18:46:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:50,663 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 8699 transitions. [2021-08-21 18:46:50,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 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 18:46:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 8699 transitions. [2021-08-21 18:46:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:46:50,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:50,670 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:50,688 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 18:46:50,885 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,SelfDestructingSolverStorable13 [2021-08-21 18:46:50,885 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1304890057, now seen corresponding path program 9 times [2021-08-21 18:46:50,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:50,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842109248] [2021-08-21 18:46:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:50,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:50,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:50,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842109248] [2021-08-21 18:46:50,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842109248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:50,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268194841] [2021-08-21 18:46:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:50,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:50,943 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 18:46:50,945 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 18:46:51,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:46:51,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:46:51,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268194841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:51,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:51,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 18:46:51,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303254106] [2021-08-21 18:46:51,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:51,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:51,243 INFO L87 Difference]: Start difference. First operand 3759 states and 8699 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:51,770 INFO L93 Difference]: Finished difference Result 15671 states and 34446 transitions. [2021-08-21 18:46:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:46:51,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:46:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:51,820 INFO L225 Difference]: With dead ends: 15671 [2021-08-21 18:46:51,820 INFO L226 Difference]: Without dead ends: 15545 [2021-08-21 18:46:51,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:46:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15545 states. [2021-08-21 18:46:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15545 to 8479. [2021-08-21 18:46:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8479 states, 8478 states have (on average 2.419438546827082) internal successors, (20512), 8478 states have internal predecessors, (20512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8479 states to 8479 states and 20512 transitions. [2021-08-21 18:46:52,042 INFO L78 Accepts]: Start accepts. Automaton has 8479 states and 20512 transitions. Word has length 33 [2021-08-21 18:46:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:52,042 INFO L470 AbstractCegarLoop]: Abstraction has 8479 states and 20512 transitions. [2021-08-21 18:46:52,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8479 states and 20512 transitions. [2021-08-21 18:46:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:46:52,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:52,059 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:52,078 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 18:46:52,273 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,SelfDestructingSolverStorable14 [2021-08-21 18:46:52,273 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1560926719, now seen corresponding path program 10 times [2021-08-21 18:46:52,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:52,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037122389] [2021-08-21 18:46:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:52,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:46:52,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:52,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037122389] [2021-08-21 18:46:52,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037122389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:52,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358951390] [2021-08-21 18:46:52,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:46:52,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:52,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:52,323 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 18:46:52,346 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 18:46:52,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:52,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:46:52,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358951390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:52,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:52,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 18:46:52,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135531755] [2021-08-21 18:46:52,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:46:52,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:46:52,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:46:52,652 INFO L87 Difference]: Start difference. First operand 8479 states and 20512 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 18:46:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:52,757 INFO L93 Difference]: Finished difference Result 10988 states and 25961 transitions. [2021-08-21 18:46:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:46:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 33 [2021-08-21 18:46:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:52,781 INFO L225 Difference]: With dead ends: 10988 [2021-08-21 18:46:52,781 INFO L226 Difference]: Without dead ends: 10988 [2021-08-21 18:46:52,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:46:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-08-21 18:46:52,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 9595. [2021-08-21 18:46:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 9594 states have (on average 2.423910777569314) internal successors, (23255), 9594 states have internal predecessors, (23255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 23255 transitions. [2021-08-21 18:46:52,978 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 23255 transitions. Word has length 33 [2021-08-21 18:46:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:52,979 INFO L470 AbstractCegarLoop]: Abstraction has 9595 states and 23255 transitions. [2021-08-21 18:46:52,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 18:46:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 23255 transitions. [2021-08-21 18:46:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:46:52,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:52,999 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:53,015 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 18:46:53,212 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,SelfDestructingSolverStorable15 [2021-08-21 18:46:53,213 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 627292535, now seen corresponding path program 11 times [2021-08-21 18:46:53,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:53,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201490408] [2021-08-21 18:46:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:53,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:46:53,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:53,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201490408] [2021-08-21 18:46:53,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201490408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:53,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176118266] [2021-08-21 18:46:53,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:53,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:53,260 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 18:46:53,261 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 18:46:53,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:46:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:53,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176118266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:53,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:53,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 18:46:53,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207612753] [2021-08-21 18:46:53,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:46:53,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:46:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:53,611 INFO L87 Difference]: Start difference. First operand 9595 states and 23255 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 18:46:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:54,012 INFO L93 Difference]: Finished difference Result 19255 states and 44599 transitions. [2021-08-21 18:46:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:46:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 33 [2021-08-21 18:46:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:54,051 INFO L225 Difference]: With dead ends: 19255 [2021-08-21 18:46:54,052 INFO L226 Difference]: Without dead ends: 18699 [2021-08-21 18:46:54,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:46:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18699 states. [2021-08-21 18:46:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18699 to 16070. [2021-08-21 18:46:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16070 states, 16069 states have (on average 2.449312340531458) internal successors, (39358), 16069 states have internal predecessors, (39358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16070 states to 16070 states and 39358 transitions. [2021-08-21 18:46:54,368 INFO L78 Accepts]: Start accepts. Automaton has 16070 states and 39358 transitions. Word has length 33 [2021-08-21 18:46:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:54,368 INFO L470 AbstractCegarLoop]: Abstraction has 16070 states and 39358 transitions. [2021-08-21 18:46:54,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 18:46:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 16070 states and 39358 transitions. [2021-08-21 18:46:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:46:54,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:54,397 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:54,414 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 18:46:54,612 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,SelfDestructingSolverStorable16 [2021-08-21 18:46:54,613 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1887131137, now seen corresponding path program 12 times [2021-08-21 18:46:54,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:54,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496399104] [2021-08-21 18:46:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:54,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:46:54,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:54,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496399104] [2021-08-21 18:46:54,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496399104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:54,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81219977] [2021-08-21 18:46:54,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:54,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:54,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:54,665 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 18:46:54,696 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 18:46:54,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:46:54,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:54,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:54,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:46:55,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81219977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:55,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:55,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 18:46:55,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632784793] [2021-08-21 18:46:55,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:46:55,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:55,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:46:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:46:55,105 INFO L87 Difference]: Start difference. First operand 16070 states and 39358 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 18:46:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:55,365 INFO L93 Difference]: Finished difference Result 19871 states and 47321 transitions. [2021-08-21 18:46:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:46:55,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 33 [2021-08-21 18:46:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:55,404 INFO L225 Difference]: With dead ends: 19871 [2021-08-21 18:46:55,405 INFO L226 Difference]: Without dead ends: 19871 [2021-08-21 18:46:55,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:46:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19871 states. [2021-08-21 18:46:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19871 to 16431. [2021-08-21 18:46:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16431 states, 16430 states have (on average 2.4398052343274497) internal successors, (40086), 16430 states have internal predecessors, (40086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16431 states to 16431 states and 40086 transitions. [2021-08-21 18:46:55,734 INFO L78 Accepts]: Start accepts. Automaton has 16431 states and 40086 transitions. Word has length 33 [2021-08-21 18:46:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:55,734 INFO L470 AbstractCegarLoop]: Abstraction has 16431 states and 40086 transitions. [2021-08-21 18:46:55,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 18:46:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 16431 states and 40086 transitions. [2021-08-21 18:46:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:46:55,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:55,765 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 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 18:46:55,783 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 18:46:55,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:55,977 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:55,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:55,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1570226437, now seen corresponding path program 13 times [2021-08-21 18:46:55,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:55,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257708580] [2021-08-21 18:46:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:55,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:46:56,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:56,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257708580] [2021-08-21 18:46:56,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257708580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:56,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766761957] [2021-08-21 18:46:56,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:46:56,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:56,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:56,042 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 18:46:56,043 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 18:46:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:46:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766761957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:56,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:56,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 18:46:56,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759648974] [2021-08-21 18:46:56,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:46:56,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:46:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:56,420 INFO L87 Difference]: Start difference. First operand 16431 states and 40086 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 18:46:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:57,075 INFO L93 Difference]: Finished difference Result 58678 states and 138026 transitions. [2021-08-21 18:46:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:46:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 35 [2021-08-21 18:46:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:57,208 INFO L225 Difference]: With dead ends: 58678 [2021-08-21 18:46:57,208 INFO L226 Difference]: Without dead ends: 56425 [2021-08-21 18:46:57,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:46:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56425 states. [2021-08-21 18:46:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56425 to 40545. [2021-08-21 18:46:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40545 states, 40544 states have (on average 2.479651736385162) internal successors, (100535), 40544 states have internal predecessors, (100535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40545 states to 40545 states and 100535 transitions. [2021-08-21 18:46:58,209 INFO L78 Accepts]: Start accepts. Automaton has 40545 states and 100535 transitions. Word has length 35 [2021-08-21 18:46:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:58,209 INFO L470 AbstractCegarLoop]: Abstraction has 40545 states and 100535 transitions. [2021-08-21 18:46:58,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 18:46:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 40545 states and 100535 transitions. [2021-08-21 18:46:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:46:58,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:58,294 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 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 18:46:58,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 18:46:58,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:58,503 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:46:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -282098687, now seen corresponding path program 14 times [2021-08-21 18:46:58,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:58,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678359863] [2021-08-21 18:46:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:58,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:46:58,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:58,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678359863] [2021-08-21 18:46:58,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678359863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:58,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621692101] [2021-08-21 18:46:58,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:58,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:58,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:58,745 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 18:46:58,784 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 18:46:59,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:59,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:59,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:46:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 18:46:59,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621692101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:59,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:59,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-08-21 18:46:59,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609801439] [2021-08-21 18:46:59,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:46:59,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:46:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:59,229 INFO L87 Difference]: Start difference. First operand 40545 states and 100535 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:00,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:00,059 INFO L93 Difference]: Finished difference Result 132417 states and 315871 transitions. [2021-08-21 18:47:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:47:00,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:47:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:00,622 INFO L225 Difference]: With dead ends: 132417 [2021-08-21 18:47:00,622 INFO L226 Difference]: Without dead ends: 132195 [2021-08-21 18:47:00,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:47:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132195 states. [2021-08-21 18:47:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132195 to 87853. [2021-08-21 18:47:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87853 states, 87852 states have (on average 2.576355689113509) internal successors, (226338), 87852 states have internal predecessors, (226338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87853 states to 87853 states and 226338 transitions. [2021-08-21 18:47:02,912 INFO L78 Accepts]: Start accepts. Automaton has 87853 states and 226338 transitions. Word has length 35 [2021-08-21 18:47:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:02,913 INFO L470 AbstractCegarLoop]: Abstraction has 87853 states and 226338 transitions. [2021-08-21 18:47:02,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 87853 states and 226338 transitions. [2021-08-21 18:47:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:47:03,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:03,286 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:03,303 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 18:47:03,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:03,486 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:47:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:03,487 INFO L82 PathProgramCache]: Analyzing trace with hash -196495617, now seen corresponding path program 15 times [2021-08-21 18:47:03,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:03,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051232434] [2021-08-21 18:47:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:03,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:03,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:03,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051232434] [2021-08-21 18:47:03,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051232434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:03,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777475841] [2021-08-21 18:47:03,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:03,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:03,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:03,556 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 18:47:03,557 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 18:47:03,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:47:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:47:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:47:04,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777475841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:04,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:04,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 18:47:04,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869032805] [2021-08-21 18:47:04,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:47:04,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:47:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:47:04,118 INFO L87 Difference]: Start difference. First operand 87853 states and 226338 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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 18:47:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:04,646 INFO L93 Difference]: Finished difference Result 88338 states and 227030 transitions. [2021-08-21 18:47:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:47:04,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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 37 [2021-08-21 18:47:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:04,881 INFO L225 Difference]: With dead ends: 88338 [2021-08-21 18:47:04,882 INFO L226 Difference]: Without dead ends: 88126 [2021-08-21 18:47:04,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:47:05,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88126 states. [2021-08-21 18:47:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88126 to 65072. [2021-08-21 18:47:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65072 states, 65071 states have (on average 2.596302500345776) internal successors, (168944), 65071 states have internal predecessors, (168944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65072 states to 65072 states and 168944 transitions. [2021-08-21 18:47:06,522 INFO L78 Accepts]: Start accepts. Automaton has 65072 states and 168944 transitions. Word has length 37 [2021-08-21 18:47:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:06,523 INFO L470 AbstractCegarLoop]: Abstraction has 65072 states and 168944 transitions. [2021-08-21 18:47:06,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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 18:47:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 65072 states and 168944 transitions. [2021-08-21 18:47:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:47:06,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:06,637 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:06,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:06,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:06,845 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:47:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash 671117819, now seen corresponding path program 16 times [2021-08-21 18:47:06,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:06,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030763747] [2021-08-21 18:47:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:06,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:06,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:06,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030763747] [2021-08-21 18:47:06,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030763747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:06,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376623485] [2021-08-21 18:47:06,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:47:06,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:06,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:06,956 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 18:47:06,957 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 18:47:07,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:47:07,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:47:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:47:07,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376623485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:07,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:07,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-21 18:47:07,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260898885] [2021-08-21 18:47:07,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:47:07,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:47:07,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:47:07,572 INFO L87 Difference]: Start difference. First operand 65072 states and 168944 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 18:47:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:08,370 INFO L93 Difference]: Finished difference Result 125094 states and 318712 transitions. [2021-08-21 18:47:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:47:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 37 [2021-08-21 18:47:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:08,808 INFO L225 Difference]: With dead ends: 125094 [2021-08-21 18:47:08,809 INFO L226 Difference]: Without dead ends: 121676 [2021-08-21 18:47:08,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:47:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121676 states. [2021-08-21 18:47:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121676 to 84656. [2021-08-21 18:47:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84656 states, 84655 states have (on average 2.6130175417872543) internal successors, (221205), 84655 states have internal predecessors, (221205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84656 states to 84656 states and 221205 transitions. [2021-08-21 18:47:11,180 INFO L78 Accepts]: Start accepts. Automaton has 84656 states and 221205 transitions. Word has length 37 [2021-08-21 18:47:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:11,180 INFO L470 AbstractCegarLoop]: Abstraction has 84656 states and 221205 transitions. [2021-08-21 18:47:11,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 18:47:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 84656 states and 221205 transitions. [2021-08-21 18:47:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:47:11,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:11,350 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:11,370 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 18:47:11,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:11,564 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:47:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash -538239615, now seen corresponding path program 17 times [2021-08-21 18:47:11,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:11,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896532482] [2021-08-21 18:47:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:11,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:47:11,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:11,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896532482] [2021-08-21 18:47:11,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896532482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:11,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700094727] [2021-08-21 18:47:11,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:47:11,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:11,638 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 18:47:11,664 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 18:47:11,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:47:11,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:11,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:47:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:47:12,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700094727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:12,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:12,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 18:47:12,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749892947] [2021-08-21 18:47:12,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:47:12,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:12,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:47:12,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:47:12,142 INFO L87 Difference]: Start difference. First operand 84656 states and 221205 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 18:47:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:14,191 INFO L93 Difference]: Finished difference Result 303302 states and 777518 transitions. [2021-08-21 18:47:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:47:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 39 [2021-08-21 18:47:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:15,670 INFO L225 Difference]: With dead ends: 303302 [2021-08-21 18:47:15,670 INFO L226 Difference]: Without dead ends: 302062 [2021-08-21 18:47:15,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:47:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302062 states. [2021-08-21 18:47:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302062 to 99069. [2021-08-21 18:47:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99069 states, 99068 states have (on average 2.5864355796018894) internal successors, (256233), 99068 states have internal predecessors, (256233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99069 states to 99069 states and 256233 transitions. [2021-08-21 18:47:19,533 INFO L78 Accepts]: Start accepts. Automaton has 99069 states and 256233 transitions. Word has length 39 [2021-08-21 18:47:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:19,533 INFO L470 AbstractCegarLoop]: Abstraction has 99069 states and 256233 transitions. [2021-08-21 18:47:19,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 18:47:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 99069 states and 256233 transitions. [2021-08-21 18:47:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:47:20,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:20,034 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:20,055 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 18:47:20,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:20,234 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:47:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash -590852219, now seen corresponding path program 18 times [2021-08-21 18:47:20,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:20,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187742246] [2021-08-21 18:47:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:20,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:47:20,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:20,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187742246] [2021-08-21 18:47:20,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187742246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:20,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383449571] [2021-08-21 18:47:20,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:47:20,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:20,286 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 18:47:20,287 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 18:47:20,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:47:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:20,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:47:20,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 18:47:20,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383449571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:20,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:20,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-08-21 18:47:20,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233550279] [2021-08-21 18:47:20,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:47:20,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:47:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:47:20,845 INFO L87 Difference]: Start difference. First operand 99069 states and 256233 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 18:47:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:23,634 INFO L93 Difference]: Finished difference Result 307271 states and 792307 transitions. [2021-08-21 18:47:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 18:47:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 39 [2021-08-21 18:47:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:25,079 INFO L225 Difference]: With dead ends: 307271 [2021-08-21 18:47:25,079 INFO L226 Difference]: Without dead ends: 304683 [2021-08-21 18:47:25,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 892.5ms TimeCoverageRelationStatistics Valid=1037, Invalid=4219, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:47:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304683 states. [2021-08-21 18:47:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304683 to 226653. [2021-08-21 18:47:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226653 states, 226652 states have (on average 2.619495967386125) internal successors, (593714), 226652 states have internal predecessors, (593714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226653 states to 226653 states and 593714 transitions. [2021-08-21 18:47:32,028 INFO L78 Accepts]: Start accepts. Automaton has 226653 states and 593714 transitions. Word has length 39 [2021-08-21 18:47:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:32,028 INFO L470 AbstractCegarLoop]: Abstraction has 226653 states and 593714 transitions. [2021-08-21 18:47:32,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 18:47:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 226653 states and 593714 transitions. [2021-08-21 18:47:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:47:32,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:32,783 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:32,804 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 18:47:32,987 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,SelfDestructingSolverStorable23 [2021-08-21 18:47:32,987 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:47:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1391607685, now seen corresponding path program 19 times [2021-08-21 18:47:32,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:32,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35506683] [2021-08-21 18:47:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:32,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:47:33,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:33,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35506683] [2021-08-21 18:47:33,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35506683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:33,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128903115] [2021-08-21 18:47:33,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:47:33,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:33,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:33,046 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 18:47:33,047 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 18:47:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:33,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:47:33,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:47:33,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128903115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:33,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:33,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-21 18:47:33,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139226666] [2021-08-21 18:47:33,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:47:33,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:33,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:47:33,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:47:33,558 INFO L87 Difference]: Start difference. First operand 226653 states and 593714 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 18:47:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:36,160 INFO L93 Difference]: Finished difference Result 366857 states and 936835 transitions. [2021-08-21 18:47:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:47:36,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 39 [2021-08-21 18:47:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:38,667 INFO L225 Difference]: With dead ends: 366857 [2021-08-21 18:47:38,668 INFO L226 Difference]: Without dead ends: 366061 [2021-08-21 18:47:38,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:47:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366061 states. [2021-08-21 18:47:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366061 to 326371. [2021-08-21 18:47:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326371 states, 326370 states have (on average 2.629677972852897) internal successors, (858248), 326370 states have internal predecessors, (858248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326371 states to 326371 states and 858248 transitions. [2021-08-21 18:47:48,857 INFO L78 Accepts]: Start accepts. Automaton has 326371 states and 858248 transitions. Word has length 39 [2021-08-21 18:47:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:48,858 INFO L470 AbstractCegarLoop]: Abstraction has 326371 states and 858248 transitions. [2021-08-21 18:47:48,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 18:47:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 326371 states and 858248 transitions. [2021-08-21 18:47:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:47:49,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:49,523 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:49,539 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 18:47:49,723 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,SelfDestructingSolverStorable24 [2021-08-21 18:47:49,723 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:47:49,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:49,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1932566651, now seen corresponding path program 20 times [2021-08-21 18:47:49,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:49,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185408713] [2021-08-21 18:47:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:49,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:47:49,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:49,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185408713] [2021-08-21 18:47:49,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185408713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:49,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503037010] [2021-08-21 18:47:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:47:49,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:49,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:49,778 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 18:47:49,779 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 18:47:50,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:47:50,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:47:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:47:50,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503037010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:50,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:50,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 18:47:50,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193384652] [2021-08-21 18:47:50,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:47:50,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:47:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:47:50,559 INFO L87 Difference]: Start difference. First operand 326371 states and 858248 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 18:47:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:53,208 INFO L93 Difference]: Finished difference Result 376080 states and 964032 transitions. [2021-08-21 18:47:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:47:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 39 [2021-08-21 18:47:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:54,619 INFO L225 Difference]: With dead ends: 376080 [2021-08-21 18:47:54,619 INFO L226 Difference]: Without dead ends: 376080 [2021-08-21 18:47:54,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:47:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376080 states. [2021-08-21 18:48:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376080 to 330042. [2021-08-21 18:48:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330042 states, 330041 states have (on average 2.6265494287073423) internal successors, (866869), 330041 states have internal predecessors, (866869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330042 states to 330042 states and 866869 transitions. [2021-08-21 18:48:05,153 INFO L78 Accepts]: Start accepts. Automaton has 330042 states and 866869 transitions. Word has length 39 [2021-08-21 18:48:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:05,153 INFO L470 AbstractCegarLoop]: Abstraction has 330042 states and 866869 transitions. [2021-08-21 18:48:05,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 18:48:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 330042 states and 866869 transitions. [2021-08-21 18:48:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:48:06,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:06,612 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:48:06,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:06,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:48:06,825 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:48:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:06,825 INFO L82 PathProgramCache]: Analyzing trace with hash 473634493, now seen corresponding path program 21 times [2021-08-21 18:48:06,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:06,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324878747] [2021-08-21 18:48:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:06,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:48:06,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:06,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324878747] [2021-08-21 18:48:06,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324878747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:06,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173424272] [2021-08-21 18:48:06,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:48:06,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:06,929 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 18:48:06,930 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 18:48:07,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:48:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:48:07,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173424272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:07,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:07,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 18:48:07,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185927445] [2021-08-21 18:48:07,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:48:07,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:07,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:48:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:07,554 INFO L87 Difference]: Start difference. First operand 330042 states and 866869 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 18:48:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:20,211 INFO L93 Difference]: Finished difference Result 1523831 states and 3937189 transitions. [2021-08-21 18:48:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:48:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 39 [2021-08-21 18:48:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:29,381 INFO L225 Difference]: With dead ends: 1523831 [2021-08-21 18:48:29,381 INFO L226 Difference]: Without dead ends: 1519685 [2021-08-21 18:48:29,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 949.2ms TimeCoverageRelationStatistics Valid=1336, Invalid=4984, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 18:48:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519685 states. [2021-08-21 18:49:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519685 to 618754. [2021-08-21 18:49:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618754 states, 618753 states have (on average 2.5718275305331852) internal successors, (1591326), 618753 states have internal predecessors, (1591326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618754 states to 618754 states and 1591326 transitions. [2021-08-21 18:49:12,740 INFO L78 Accepts]: Start accepts. Automaton has 618754 states and 1591326 transitions. Word has length 39 [2021-08-21 18:49:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:12,740 INFO L470 AbstractCegarLoop]: Abstraction has 618754 states and 1591326 transitions. [2021-08-21 18:49:12,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 18:49:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 618754 states and 1591326 transitions. [2021-08-21 18:49:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:49:15,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:15,180 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:15,200 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 18:49:15,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:15,393 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash -774628223, now seen corresponding path program 22 times [2021-08-21 18:49:15,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:15,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385145098] [2021-08-21 18:49:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:15,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:15,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:15,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385145098] [2021-08-21 18:49:15,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385145098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:15,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184573372] [2021-08-21 18:49:15,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:15,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:15,478 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 18:49:15,479 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 18:49:16,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:16,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:16,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184573372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:16,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:16,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-21 18:49:16,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862441000] [2021-08-21 18:49:16,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:16,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:16,373 INFO L87 Difference]: Start difference. First operand 618754 states and 1591326 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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)