/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/add-sub03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:28:29,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:28:29,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:28:29,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:28:29,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 13:28:29,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:28:29,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:28:29,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:28:29,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:28:29,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:28:29,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:28:29,846 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:28:29,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:28:29,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:28:29,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:28:29,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:28:29,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:28:29,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:28:29,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:28:29,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:28:29,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:28:29,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:28:29,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:28:29,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:28:29,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:28:29,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:28:29,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:28:29,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:28:29,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:28:29,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:28:29,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:28:29,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:28:29,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:28:29,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:28:29,850 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:28:29,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:28:29,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:28:30,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:28:30,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:28:30,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:28:30,202 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:28:30,204 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:28:30,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub03.bpl [2021-08-21 13:28:30,224 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub03.bpl' [2021-08-21 13:28:30,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:28:30,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:28:30,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:28:30,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:28:30,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:28:30,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:28:30,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:28:30,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:28:30,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:28:30,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:28:30,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:28:30,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:28:30,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:28:30,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/1) ... [2021-08-21 13:28:30,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:28:30,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:30,292 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 13:28:30,307 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 13:28:30,321 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:28:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:28:30,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:28:30,321 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 13:28:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 13:28:30,322 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 13:28:30,322 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 13:28:30,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:28:30,415 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 13:28:30,417 INFO L202 PluginConnector]: Adding new model add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:28:30 BoogieIcfgContainer [2021-08-21 13:28:30,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:28:30,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:28:30,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:28:30,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:28:30,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:28:30" (1/2) ... [2021-08-21 13:28:30,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75eb8e44 and model type add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:28:30, skipping insertion in model container [2021-08-21 13:28:30,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:28:30" (2/2) ... [2021-08-21 13:28:30,424 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub03.bpl [2021-08-21 13:28:30,433 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:28:30,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:28:30,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:28:30,435 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:28:30,459 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,459 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,460 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,460 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,460 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,461 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,462 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,462 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,462 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,463 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,464 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,464 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,465 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,465 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,465 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,466 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,466 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,467 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,477 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,480 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,492 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 13:28:30,502 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 13:28:30,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:28:30,541 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 13:28:30,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 13:28:30,549 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-08-21 13:28:30,574 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 13:28:30,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:30,585 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:30,585 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1561362000, now seen corresponding path program 1 times [2021-08-21 13:28:30,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:30,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313318781] [2021-08-21 13:28:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:30,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:30,714 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 13:28:30,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:30,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313318781] [2021-08-21 13:28:30,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313318781] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:30,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:30,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 13:28:30,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647142261] [2021-08-21 13:28:30,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:28:30,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:30,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:28:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:28:30,745 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 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, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:30,793 INFO L93 Difference]: Finished difference Result 160 states and 456 transitions. [2021-08-21 13:28:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:28:30,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 13:28:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:30,801 INFO L225 Difference]: With dead ends: 160 [2021-08-21 13:28:30,801 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 13:28:30,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:28:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 13:28:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 125. [2021-08-21 13:28:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.870967741935484) internal successors, (356), 124 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 356 transitions. [2021-08-21 13:28:30,845 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 356 transitions. Word has length 11 [2021-08-21 13:28:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:30,846 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 356 transitions. [2021-08-21 13:28:30,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,846 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 356 transitions. [2021-08-21 13:28:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 13:28:30,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:30,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:30,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:28:30,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1561808572, now seen corresponding path program 1 times [2021-08-21 13:28:30,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:30,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298826853] [2021-08-21 13:28:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:30,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:28:30,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:30,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298826853] [2021-08-21 13:28:30,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298826853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:30,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:30,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:28:30,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357566861] [2021-08-21 13:28:30,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:28:30,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:28:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:28:30,917 INFO L87 Difference]: Start difference. First operand 125 states and 356 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:30,944 INFO L93 Difference]: Finished difference Result 186 states and 534 transitions. [2021-08-21 13:28:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:28:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 13:28:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:30,946 INFO L225 Difference]: With dead ends: 186 [2021-08-21 13:28:30,946 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 13:28:30,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:28:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 13:28:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2021-08-21 13:28:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8931297709923665) internal successors, (379), 131 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 379 transitions. [2021-08-21 13:28:30,956 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 379 transitions. Word has length 14 [2021-08-21 13:28:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:30,957 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 379 transitions. [2021-08-21 13:28:30,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 379 transitions. [2021-08-21 13:28:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 13:28:30,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:30,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:30,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:28:30,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:30,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2416982, now seen corresponding path program 1 times [2021-08-21 13:28:30,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:30,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671521456] [2021-08-21 13:28:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:30,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:28:31,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:31,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671521456] [2021-08-21 13:28:31,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671521456] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:31,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:31,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:28:31,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501615920] [2021-08-21 13:28:31,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:28:31,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:28:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:28:31,003 INFO L87 Difference]: Start difference. First operand 132 states and 379 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:31,026 INFO L93 Difference]: Finished difference Result 210 states and 603 transitions. [2021-08-21 13:28:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:28:31,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 13:28:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:31,028 INFO L225 Difference]: With dead ends: 210 [2021-08-21 13:28:31,028 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 13:28:31,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:28:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 13:28:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2021-08-21 13:28:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9276315789473686) internal successors, (445), 152 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 445 transitions. [2021-08-21 13:28:31,037 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 445 transitions. Word has length 14 [2021-08-21 13:28:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:31,037 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 445 transitions. [2021-08-21 13:28:31,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 445 transitions. [2021-08-21 13:28:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 13:28:31,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:31,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:31,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:28:31,038 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:31,039 INFO L82 PathProgramCache]: Analyzing trace with hash 979061296, now seen corresponding path program 1 times [2021-08-21 13:28:31,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:31,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618502336] [2021-08-21 13:28:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:31,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:28:31,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:31,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618502336] [2021-08-21 13:28:31,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618502336] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:31,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:31,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:28:31,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838450102] [2021-08-21 13:28:31,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:28:31,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:28:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:28:31,078 INFO L87 Difference]: Start difference. First operand 153 states and 445 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:31,100 INFO L93 Difference]: Finished difference Result 232 states and 674 transitions. [2021-08-21 13:28:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:28:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 13:28:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:31,102 INFO L225 Difference]: With dead ends: 232 [2021-08-21 13:28:31,102 INFO L226 Difference]: Without dead ends: 220 [2021-08-21 13:28:31,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:28:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-21 13:28:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 176. [2021-08-21 13:28:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9657142857142857) internal successors, (519), 175 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 519 transitions. [2021-08-21 13:28:31,111 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 519 transitions. Word has length 14 [2021-08-21 13:28:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:31,112 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 519 transitions. [2021-08-21 13:28:31,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 519 transitions. [2021-08-21 13:28:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:31,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:31,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:31,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 13:28:31,113 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash -495560222, now seen corresponding path program 1 times [2021-08-21 13:28:31,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:31,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66244308] [2021-08-21 13:28:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:31,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:28:31,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:31,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66244308] [2021-08-21 13:28:31,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66244308] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:31,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:31,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:28:31,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314535595] [2021-08-21 13:28:31,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:28:31,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:28:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:31,172 INFO L87 Difference]: Start difference. First operand 176 states and 519 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:31,207 INFO L93 Difference]: Finished difference Result 253 states and 736 transitions. [2021-08-21 13:28:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:28:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:31,209 INFO L225 Difference]: With dead ends: 253 [2021-08-21 13:28:31,209 INFO L226 Difference]: Without dead ends: 232 [2021-08-21 13:28:31,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-21 13:28:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-08-21 13:28:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-08-21 13:28:31,216 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 17 [2021-08-21 13:28:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:31,217 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-08-21 13:28:31,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-08-21 13:28:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:31,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:31,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:31,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 13:28:31,218 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:31,218 INFO L82 PathProgramCache]: Analyzing trace with hash 481084092, now seen corresponding path program 1 times [2021-08-21 13:28:31,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:31,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563095454] [2021-08-21 13:28:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:31,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:28:31,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:31,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563095454] [2021-08-21 13:28:31,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563095454] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:31,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:31,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:28:31,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068084496] [2021-08-21 13:28:31,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:28:31,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:28:31,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:31,273 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:31,310 INFO L93 Difference]: Finished difference Result 272 states and 794 transitions. [2021-08-21 13:28:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:28:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:31,323 INFO L225 Difference]: With dead ends: 272 [2021-08-21 13:28:31,323 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 13:28:31,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 13:28:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 190. [2021-08-21 13:28:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9576719576719577) internal successors, (559), 189 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 559 transitions. [2021-08-21 13:28:31,330 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 559 transitions. Word has length 17 [2021-08-21 13:28:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:31,330 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 559 transitions. [2021-08-21 13:28:31,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 559 transitions. [2021-08-21 13:28:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:31,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:31,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:31,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 13:28:31,331 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:31,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1207989410, now seen corresponding path program 2 times [2021-08-21 13:28:31,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:31,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732444150] [2021-08-21 13:28:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:31,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:31,386 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 13:28:31,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732444150] [2021-08-21 13:28:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732444150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815384053] [2021-08-21 13:28:31,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:31,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:31,388 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 13:28:31,400 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 13:28:31,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:31,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:31,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:28:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:31,550 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 13:28:31,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815384053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:31,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:31,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 13:28:31,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059217037] [2021-08-21 13:28:31,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:28:31,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:28:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:31,552 INFO L87 Difference]: Start difference. First operand 190 states and 559 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:31,599 INFO L93 Difference]: Finished difference Result 270 states and 790 transitions. [2021-08-21 13:28:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:28:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:31,600 INFO L225 Difference]: With dead ends: 270 [2021-08-21 13:28:31,600 INFO L226 Difference]: Without dead ends: 234 [2021-08-21 13:28:31,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-21 13:28:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 180. [2021-08-21 13:28:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9385474860335195) internal successors, (526), 179 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 526 transitions. [2021-08-21 13:28:31,606 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 526 transitions. Word has length 17 [2021-08-21 13:28:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:31,607 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 526 transitions. [2021-08-21 13:28:31,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 526 transitions. [2021-08-21 13:28:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:31,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:31,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:31,627 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 13:28:31,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:31,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1059035642, now seen corresponding path program 2 times [2021-08-21 13:28:31,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:31,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542159721] [2021-08-21 13:28:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:31,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:28:31,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:31,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542159721] [2021-08-21 13:28:31,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542159721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:31,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:31,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:28:31,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703776786] [2021-08-21 13:28:31,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:28:31,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:31,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:28:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:31,904 INFO L87 Difference]: Start difference. First operand 180 states and 526 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:31,943 INFO L93 Difference]: Finished difference Result 265 states and 773 transitions. [2021-08-21 13:28:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:28:31,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:31,946 INFO L225 Difference]: With dead ends: 265 [2021-08-21 13:28:31,946 INFO L226 Difference]: Without dead ends: 258 [2021-08-21 13:28:31,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-21 13:28:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 216. [2021-08-21 13:28:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.013953488372093) internal successors, (648), 215 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-08-21 13:28:31,963 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 17 [2021-08-21 13:28:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:31,963 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-08-21 13:28:31,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-08-21 13:28:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:31,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:31,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:31,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 13:28:31,965 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:31,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1074496438, now seen corresponding path program 3 times [2021-08-21 13:28:31,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:31,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048334100] [2021-08-21 13:28:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:31,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:32,055 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 13:28:32,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:32,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048334100] [2021-08-21 13:28:32,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048334100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:32,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010646395] [2021-08-21 13:28:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:32,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:32,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:32,057 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 13:28:32,111 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 13:28:32,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:28:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:32,296 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 13:28:32,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010646395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:32,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:32,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 13:28:32,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214643409] [2021-08-21 13:28:32,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:28:32,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:28:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:32,297 INFO L87 Difference]: Start difference. First operand 216 states and 648 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:32,354 INFO L93 Difference]: Finished difference Result 287 states and 853 transitions. [2021-08-21 13:28:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:28:32,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:32,358 INFO L225 Difference]: With dead ends: 287 [2021-08-21 13:28:32,358 INFO L226 Difference]: Without dead ends: 242 [2021-08-21 13:28:32,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-21 13:28:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 158. [2021-08-21 13:28:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-08-21 13:28:32,364 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-08-21 13:28:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:32,365 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-08-21 13:28:32,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-08-21 13:28:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:32,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:32,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:32,389 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 13:28:32,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-21 13:28:32,573 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1314252362, now seen corresponding path program 1 times [2021-08-21 13:28:32,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:32,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242931326] [2021-08-21 13:28:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:32,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:28:32,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:32,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242931326] [2021-08-21 13:28:32,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242931326] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:32,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:32,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:28:32,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674967851] [2021-08-21 13:28:32,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:28:32,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:28:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:32,628 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:32,663 INFO L93 Difference]: Finished difference Result 278 states and 807 transitions. [2021-08-21 13:28:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:28:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:32,665 INFO L225 Difference]: With dead ends: 278 [2021-08-21 13:28:32,665 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 13:28:32,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:32,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 13:28:32,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 208. [2021-08-21 13:28:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-08-21 13:28:32,669 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 17 [2021-08-21 13:28:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:32,670 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-08-21 13:28:32,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-08-21 13:28:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:32,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:32,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:32,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 13:28:32,671 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1239376250, now seen corresponding path program 2 times [2021-08-21 13:28:32,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:32,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850051100] [2021-08-21 13:28:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:32,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:28:32,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:32,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850051100] [2021-08-21 13:28:32,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850051100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:32,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:32,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:28:32,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216690969] [2021-08-21 13:28:32,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:28:32,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:28:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:32,717 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:32,757 INFO L93 Difference]: Finished difference Result 294 states and 861 transitions. [2021-08-21 13:28:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:28:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:32,759 INFO L225 Difference]: With dead ends: 294 [2021-08-21 13:28:32,759 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 13:28:32,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:28:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 13:28:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 249. [2021-08-21 13:28:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.0) internal successors, (744), 248 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 744 transitions. [2021-08-21 13:28:32,764 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 744 transitions. Word has length 17 [2021-08-21 13:28:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:32,764 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 744 transitions. [2021-08-21 13:28:32,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 744 transitions. [2021-08-21 13:28:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:28:32,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:32,765 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:32,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 13:28:32,765 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1606559154, now seen corresponding path program 3 times [2021-08-21 13:28:32,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:32,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57631671] [2021-08-21 13:28:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:32,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:32,821 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 13:28:32,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:32,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57631671] [2021-08-21 13:28:32,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57631671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:32,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402462261] [2021-08-21 13:28:32,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:32,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:32,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:32,837 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 13:28:32,855 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 13:28:32,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:32,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:28:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:33,042 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 13:28:33,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402462261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:33,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:33,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 13:28:33,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593416534] [2021-08-21 13:28:33,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:28:33,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:33,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:28:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:33,044 INFO L87 Difference]: Start difference. First operand 249 states and 744 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:33,099 INFO L93 Difference]: Finished difference Result 335 states and 992 transitions. [2021-08-21 13:28:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:28:33,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:28:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:33,101 INFO L225 Difference]: With dead ends: 335 [2021-08-21 13:28:33,101 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 13:28:33,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 13:28:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2021-08-21 13:28:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-21 13:28:33,105 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 17 [2021-08-21 13:28:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:33,105 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-21 13:28:33,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-21 13:28:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:33,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:33,106 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] [2021-08-21 13:28:33,126 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 13:28:33,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:33,327 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:33,327 INFO L82 PathProgramCache]: Analyzing trace with hash 892408382, now seen corresponding path program 1 times [2021-08-21 13:28:33,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:33,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576566616] [2021-08-21 13:28:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:33,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 13:28:33,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:33,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576566616] [2021-08-21 13:28:33,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576566616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:33,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:33,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:28:33,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116142260] [2021-08-21 13:28:33,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:28:33,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:28:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:33,403 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:33,455 INFO L93 Difference]: Finished difference Result 332 states and 971 transitions. [2021-08-21 13:28:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:28:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:33,457 INFO L225 Difference]: With dead ends: 332 [2021-08-21 13:28:33,457 INFO L226 Difference]: Without dead ends: 303 [2021-08-21 13:28:33,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-21 13:28:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 273. [2021-08-21 13:28:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0294117647058822) internal successors, (824), 272 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 824 transitions. [2021-08-21 13:28:33,462 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 824 transitions. Word has length 20 [2021-08-21 13:28:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:33,462 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 824 transitions. [2021-08-21 13:28:33,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 824 transitions. [2021-08-21 13:28:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:33,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:33,463 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] [2021-08-21 13:28:33,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 13:28:33,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1661220230, now seen corresponding path program 2 times [2021-08-21 13:28:33,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:33,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176792310] [2021-08-21 13:28:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:33,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 13:28:33,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:33,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176792310] [2021-08-21 13:28:33,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176792310] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:33,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:33,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:28:33,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372101705] [2021-08-21 13:28:33,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:28:33,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:28:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:33,518 INFO L87 Difference]: Start difference. First operand 273 states and 824 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:33,574 INFO L93 Difference]: Finished difference Result 391 states and 1167 transitions. [2021-08-21 13:28:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:28:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:33,578 INFO L225 Difference]: With dead ends: 391 [2021-08-21 13:28:33,578 INFO L226 Difference]: Without dead ends: 374 [2021-08-21 13:28:33,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-08-21 13:28:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 346. [2021-08-21 13:28:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.0898550724637683) internal successors, (1066), 345 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1066 transitions. [2021-08-21 13:28:33,585 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1066 transitions. Word has length 20 [2021-08-21 13:28:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:33,585 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1066 transitions. [2021-08-21 13:28:33,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1066 transitions. [2021-08-21 13:28:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:33,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:33,588 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] [2021-08-21 13:28:33,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 13:28:33,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:33,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1184715174, now seen corresponding path program 3 times [2021-08-21 13:28:33,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:33,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688398177] [2021-08-21 13:28:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:33,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:33,671 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 13:28:33,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:33,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688398177] [2021-08-21 13:28:33,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688398177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:33,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734721606] [2021-08-21 13:28:33,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:33,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:33,674 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 13:28:33,675 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 13:28:33,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:33,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:33,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:33,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:33,852 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 13:28:33,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734721606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:33,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:33,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:33,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134487256] [2021-08-21 13:28:33,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:33,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:33,853 INFO L87 Difference]: Start difference. First operand 346 states and 1066 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:33,931 INFO L93 Difference]: Finished difference Result 429 states and 1304 transitions. [2021-08-21 13:28:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:33,932 INFO L225 Difference]: With dead ends: 429 [2021-08-21 13:28:33,932 INFO L226 Difference]: Without dead ends: 338 [2021-08-21 13:28:33,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-21 13:28:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 219. [2021-08-21 13:28:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.967889908256881) internal successors, (647), 218 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 647 transitions. [2021-08-21 13:28:33,937 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 647 transitions. Word has length 20 [2021-08-21 13:28:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:33,937 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 647 transitions. [2021-08-21 13:28:33,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 647 transitions. [2021-08-21 13:28:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:33,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:33,938 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] [2021-08-21 13:28:33,954 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 13:28:34,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 13:28:34,154 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1415487746, now seen corresponding path program 4 times [2021-08-21 13:28:34,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:34,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083126949] [2021-08-21 13:28:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:34,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:34,220 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 13:28:34,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:34,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083126949] [2021-08-21 13:28:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083126949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:34,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916761345] [2021-08-21 13:28:34,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:34,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:34,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:34,224 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 13:28:34,224 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 13:28:34,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:34,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:34,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:34,414 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 13:28:34,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916761345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:34,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:34,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:34,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557435082] [2021-08-21 13:28:34,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:34,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:34,415 INFO L87 Difference]: Start difference. First operand 219 states and 647 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:34,481 INFO L93 Difference]: Finished difference Result 332 states and 980 transitions. [2021-08-21 13:28:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:34,482 INFO L225 Difference]: With dead ends: 332 [2021-08-21 13:28:34,482 INFO L226 Difference]: Without dead ends: 288 [2021-08-21 13:28:34,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-08-21 13:28:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 240. [2021-08-21 13:28:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.01255230125523) internal successors, (720), 239 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 720 transitions. [2021-08-21 13:28:34,487 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 720 transitions. Word has length 20 [2021-08-21 13:28:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:34,488 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 720 transitions. [2021-08-21 13:28:34,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 720 transitions. [2021-08-21 13:28:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:34,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:34,489 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] [2021-08-21 13:28:34,507 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 13:28:34,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 13:28:34,705 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1138140866, now seen corresponding path program 5 times [2021-08-21 13:28:34,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:34,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641816316] [2021-08-21 13:28:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:34,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:34,769 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 13:28:34,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:34,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641816316] [2021-08-21 13:28:34,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641816316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:34,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441002704] [2021-08-21 13:28:34,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:34,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:34,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:34,785 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 13:28:34,801 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 13:28:34,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:34,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:34,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:35,009 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 13:28:35,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441002704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:35,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:35,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:35,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846121818] [2021-08-21 13:28:35,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:35,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:35,011 INFO L87 Difference]: Start difference. First operand 240 states and 720 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:35,078 INFO L93 Difference]: Finished difference Result 399 states and 1203 transitions. [2021-08-21 13:28:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:35,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:35,080 INFO L225 Difference]: With dead ends: 399 [2021-08-21 13:28:35,080 INFO L226 Difference]: Without dead ends: 366 [2021-08-21 13:28:35,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-08-21 13:28:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 355. [2021-08-21 13:28:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.073446327683616) internal successors, (1088), 354 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1088 transitions. [2021-08-21 13:28:35,087 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1088 transitions. Word has length 20 [2021-08-21 13:28:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:35,087 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1088 transitions. [2021-08-21 13:28:35,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1088 transitions. [2021-08-21 13:28:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:35,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:35,088 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] [2021-08-21 13:28:35,109 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 13:28:35,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 13:28:35,308 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1707794538, now seen corresponding path program 6 times [2021-08-21 13:28:35,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:35,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659465577] [2021-08-21 13:28:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:35,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:35,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:35,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659465577] [2021-08-21 13:28:35,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659465577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:35,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979549905] [2021-08-21 13:28:35,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:35,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:35,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:35,385 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 13:28:35,411 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 13:28:35,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:28:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:35,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979549905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:35,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:35,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:35,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424516302] [2021-08-21 13:28:35,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:35,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:35,597 INFO L87 Difference]: Start difference. First operand 355 states and 1088 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:35,683 INFO L93 Difference]: Finished difference Result 436 states and 1325 transitions. [2021-08-21 13:28:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:35,684 INFO L225 Difference]: With dead ends: 436 [2021-08-21 13:28:35,684 INFO L226 Difference]: Without dead ends: 335 [2021-08-21 13:28:35,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-21 13:28:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 176. [2021-08-21 13:28:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9257142857142857) internal successors, (512), 175 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 512 transitions. [2021-08-21 13:28:35,688 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 512 transitions. Word has length 20 [2021-08-21 13:28:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:35,689 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 512 transitions. [2021-08-21 13:28:35,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 512 transitions. [2021-08-21 13:28:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:35,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:35,689 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] [2021-08-21 13:28:35,711 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 13:28:35,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:35,906 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash 829520062, now seen corresponding path program 7 times [2021-08-21 13:28:35,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:35,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728307152] [2021-08-21 13:28:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:35,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 13:28:35,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:35,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728307152] [2021-08-21 13:28:35,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728307152] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:28:35,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:28:35,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:28:35,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552010910] [2021-08-21 13:28:35,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:28:35,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:28:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:35,962 INFO L87 Difference]: Start difference. First operand 176 states and 512 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:36,007 INFO L93 Difference]: Finished difference Result 293 states and 857 transitions. [2021-08-21 13:28:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:28:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:36,008 INFO L225 Difference]: With dead ends: 293 [2021-08-21 13:28:36,008 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 13:28:36,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 13:28:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 259. [2021-08-21 13:28:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.011627906976744) internal successors, (777), 258 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 777 transitions. [2021-08-21 13:28:36,014 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 777 transitions. Word has length 20 [2021-08-21 13:28:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:36,014 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 777 transitions. [2021-08-21 13:28:36,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 777 transitions. [2021-08-21 13:28:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:36,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:36,015 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] [2021-08-21 13:28:36,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 13:28:36,015 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash 814059266, now seen corresponding path program 8 times [2021-08-21 13:28:36,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:36,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851624182] [2021-08-21 13:28:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:36,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:36,075 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 13:28:36,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:36,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851624182] [2021-08-21 13:28:36,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851624182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:36,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594877847] [2021-08-21 13:28:36,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:36,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:36,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:36,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 13:28:36,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:36,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:36,317 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 13:28:36,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594877847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:36,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:36,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:36,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624176888] [2021-08-21 13:28:36,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:36,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:36,318 INFO L87 Difference]: Start difference. First operand 259 states and 777 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:36,384 INFO L93 Difference]: Finished difference Result 352 states and 1051 transitions. [2021-08-21 13:28:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:36,385 INFO L225 Difference]: With dead ends: 352 [2021-08-21 13:28:36,385 INFO L226 Difference]: Without dead ends: 307 [2021-08-21 13:28:36,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-21 13:28:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 201. [2021-08-21 13:28:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-08-21 13:28:36,390 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 20 [2021-08-21 13:28:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:36,390 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-08-21 13:28:36,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-08-21 13:28:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:36,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:36,390 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] [2021-08-21 13:28:36,408 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 13:28:36,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:36,606 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:36,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:36,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1714732290, now seen corresponding path program 9 times [2021-08-21 13:28:36,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:36,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656062258] [2021-08-21 13:28:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:36,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:36,668 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 13:28:36,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:36,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656062258] [2021-08-21 13:28:36,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656062258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:36,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408680605] [2021-08-21 13:28:36,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:36,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:36,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:36,670 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 13:28:36,671 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 13:28:36,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:36,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:36,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:36,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:36,925 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 13:28:36,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408680605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:36,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:36,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:36,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557008408] [2021-08-21 13:28:36,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:36,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:36,927 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:36,992 INFO L93 Difference]: Finished difference Result 311 states and 915 transitions. [2021-08-21 13:28:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:36,993 INFO L225 Difference]: With dead ends: 311 [2021-08-21 13:28:36,993 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 13:28:36,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 13:28:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 269. [2021-08-21 13:28:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0111940298507465) internal successors, (807), 268 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 807 transitions. [2021-08-21 13:28:36,998 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 807 transitions. Word has length 20 [2021-08-21 13:28:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:36,998 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 807 transitions. [2021-08-21 13:28:36,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 807 transitions. [2021-08-21 13:28:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:36,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:36,999 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] [2021-08-21 13:28:37,017 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 13:28:37,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:37,215 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash 607311938, now seen corresponding path program 10 times [2021-08-21 13:28:37,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:37,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693047290] [2021-08-21 13:28:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:37,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:37,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:37,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693047290] [2021-08-21 13:28:37,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693047290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:37,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057491031] [2021-08-21 13:28:37,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:37,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:37,305 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 13:28:37,325 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 13:28:37,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:37,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:37,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057491031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:37,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:37,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:37,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537281467] [2021-08-21 13:28:37,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:37,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:37,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:37,590 INFO L87 Difference]: Start difference. First operand 269 states and 807 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:37,677 INFO L93 Difference]: Finished difference Result 365 states and 1089 transitions. [2021-08-21 13:28:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:37,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:37,678 INFO L225 Difference]: With dead ends: 365 [2021-08-21 13:28:37,678 INFO L226 Difference]: Without dead ends: 340 [2021-08-21 13:28:37,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-08-21 13:28:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 281. [2021-08-21 13:28:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.007142857142857) internal successors, (842), 280 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 842 transitions. [2021-08-21 13:28:37,684 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 842 transitions. Word has length 20 [2021-08-21 13:28:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:37,684 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 842 transitions. [2021-08-21 13:28:37,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 842 transitions. [2021-08-21 13:28:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:37,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:37,685 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] [2021-08-21 13:28:37,705 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 13:28:37,901 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,SelfDestructingSolverStorable21 [2021-08-21 13:28:37,901 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1434607406, now seen corresponding path program 11 times [2021-08-21 13:28:37,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:37,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391265195] [2021-08-21 13:28:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:37,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:38,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:38,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391265195] [2021-08-21 13:28:38,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391265195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:38,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001759137] [2021-08-21 13:28:38,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:38,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:38,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:38,016 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 13:28:38,060 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 13:28:38,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:38,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:38,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:38,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001759137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:38,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:38,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:38,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156698764] [2021-08-21 13:28:38,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:38,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:38,334 INFO L87 Difference]: Start difference. First operand 281 states and 842 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:38,426 INFO L93 Difference]: Finished difference Result 410 states and 1229 transitions. [2021-08-21 13:28:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:38,429 INFO L225 Difference]: With dead ends: 410 [2021-08-21 13:28:38,429 INFO L226 Difference]: Without dead ends: 395 [2021-08-21 13:28:38,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-21 13:28:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 363. [2021-08-21 13:28:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.096685082872928) internal successors, (1121), 362 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1121 transitions. [2021-08-21 13:28:38,437 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1121 transitions. Word has length 20 [2021-08-21 13:28:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:38,437 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1121 transitions. [2021-08-21 13:28:38,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1121 transitions. [2021-08-21 13:28:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:38,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:38,438 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] [2021-08-21 13:28:38,458 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 13:28:38,654 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,SelfDestructingSolverStorable22 [2021-08-21 13:28:38,655 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:38,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1223401124, now seen corresponding path program 12 times [2021-08-21 13:28:38,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:38,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046880720] [2021-08-21 13:28:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:38,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:38,711 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 13:28:38,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:38,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046880720] [2021-08-21 13:28:38,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046880720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:38,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080448060] [2021-08-21 13:28:38,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:38,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:38,712 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 13:28:38,713 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 13:28:38,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:28:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:39,002 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 13:28:39,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080448060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:39,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:39,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:39,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699463335] [2021-08-21 13:28:39,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:39,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:39,003 INFO L87 Difference]: Start difference. First operand 363 states and 1121 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:39,070 INFO L93 Difference]: Finished difference Result 491 states and 1502 transitions. [2021-08-21 13:28:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:39,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:39,072 INFO L225 Difference]: With dead ends: 491 [2021-08-21 13:28:39,072 INFO L226 Difference]: Without dead ends: 484 [2021-08-21 13:28:39,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-21 13:28:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 433. [2021-08-21 13:28:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1643518518518516) internal successors, (1367), 432 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1367 transitions. [2021-08-21 13:28:39,080 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1367 transitions. Word has length 20 [2021-08-21 13:28:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1367 transitions. [2021-08-21 13:28:39,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1367 transitions. [2021-08-21 13:28:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:39,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:39,081 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] [2021-08-21 13:28:39,115 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 13:28:39,296 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,SelfDestructingSolverStorable23 [2021-08-21 13:28:39,296 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:39,296 INFO L82 PathProgramCache]: Analyzing trace with hash 744116448, now seen corresponding path program 13 times [2021-08-21 13:28:39,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:39,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967400227] [2021-08-21 13:28:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:39,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:39,366 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 13:28:39,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:39,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967400227] [2021-08-21 13:28:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967400227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:39,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029172840] [2021-08-21 13:28:39,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:39,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:39,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:39,381 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 13:28:39,400 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 13:28:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:39,683 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 13:28:39,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029172840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:39,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:39,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:39,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891080082] [2021-08-21 13:28:39,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:39,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:39,685 INFO L87 Difference]: Start difference. First operand 433 states and 1367 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:39,773 INFO L93 Difference]: Finished difference Result 560 states and 1738 transitions. [2021-08-21 13:28:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:39,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:39,776 INFO L225 Difference]: With dead ends: 560 [2021-08-21 13:28:39,776 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 13:28:39,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 13:28:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 398. [2021-08-21 13:28:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.1309823677581865) internal successors, (1243), 397 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1243 transitions. [2021-08-21 13:28:39,783 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1243 transitions. Word has length 20 [2021-08-21 13:28:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:39,783 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1243 transitions. [2021-08-21 13:28:39,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1243 transitions. [2021-08-21 13:28:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:39,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:39,784 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] [2021-08-21 13:28:39,801 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 13:28:39,997 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,SelfDestructingSolverStorable24 [2021-08-21 13:28:39,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1596024032, now seen corresponding path program 14 times [2021-08-21 13:28:39,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:39,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095339504] [2021-08-21 13:28:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:39,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:40,059 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 13:28:40,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:40,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095339504] [2021-08-21 13:28:40,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095339504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:40,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873793196] [2021-08-21 13:28:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:40,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:40,073 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 13:28:40,085 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 13:28:40,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:40,414 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 13:28:40,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873793196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:40,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:40,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 13:28:40,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534203487] [2021-08-21 13:28:40,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:28:40,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:40,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:28:40,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:40,415 INFO L87 Difference]: Start difference. First operand 398 states and 1243 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:40,462 INFO L93 Difference]: Finished difference Result 537 states and 1656 transitions. [2021-08-21 13:28:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:28:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:40,465 INFO L225 Difference]: With dead ends: 537 [2021-08-21 13:28:40,465 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 13:28:40,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:28:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 13:28:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 504. [2021-08-21 13:28:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.125248508946322) internal successors, (1572), 503 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1572 transitions. [2021-08-21 13:28:40,473 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1572 transitions. Word has length 20 [2021-08-21 13:28:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:40,473 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1572 transitions. [2021-08-21 13:28:40,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1572 transitions. [2021-08-21 13:28:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:40,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:40,474 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] [2021-08-21 13:28:40,505 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 13:28:40,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:40,689 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 986317886, now seen corresponding path program 15 times [2021-08-21 13:28:40,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:40,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132884393] [2021-08-21 13:28:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:40,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:40,750 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 13:28:40,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:40,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132884393] [2021-08-21 13:28:40,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132884393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:40,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740020646] [2021-08-21 13:28:40,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:40,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:40,751 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 13:28:40,752 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 13:28:40,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:41,085 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 13:28:41,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740020646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:41,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:41,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:41,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983047762] [2021-08-21 13:28:41,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:41,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:41,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:41,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:41,086 INFO L87 Difference]: Start difference. First operand 504 states and 1572 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:41,150 INFO L93 Difference]: Finished difference Result 629 states and 1939 transitions. [2021-08-21 13:28:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:41,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:41,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:41,152 INFO L225 Difference]: With dead ends: 629 [2021-08-21 13:28:41,153 INFO L226 Difference]: Without dead ends: 577 [2021-08-21 13:28:41,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-21 13:28:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 481. [2021-08-21 13:28:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.13125) internal successors, (1503), 480 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1503 transitions. [2021-08-21 13:28:41,161 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1503 transitions. Word has length 20 [2021-08-21 13:28:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:41,161 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1503 transitions. [2021-08-21 13:28:41,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1503 transitions. [2021-08-21 13:28:41,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:41,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:41,162 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] [2021-08-21 13:28:41,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:41,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 13:28:41,377 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash 564951068, now seen corresponding path program 16 times [2021-08-21 13:28:41,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:41,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600847123] [2021-08-21 13:28:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:41,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:41,432 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 13:28:41,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:41,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600847123] [2021-08-21 13:28:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600847123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:41,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115248919] [2021-08-21 13:28:41,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:41,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:41,434 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 13:28:41,434 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 13:28:41,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:41,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:41,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:41,760 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 13:28:41,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115248919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:41,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:41,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:28:41,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070693135] [2021-08-21 13:28:41,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:28:41,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:28:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:41,761 INFO L87 Difference]: Start difference. First operand 481 states and 1503 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:41,821 INFO L93 Difference]: Finished difference Result 718 states and 2218 transitions. [2021-08-21 13:28:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:28:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:41,823 INFO L225 Difference]: With dead ends: 718 [2021-08-21 13:28:41,823 INFO L226 Difference]: Without dead ends: 660 [2021-08-21 13:28:41,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:28:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-08-21 13:28:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 645. [2021-08-21 13:28:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.124223602484472) internal successors, (2012), 644 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2012 transitions. [2021-08-21 13:28:41,833 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2012 transitions. Word has length 20 [2021-08-21 13:28:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:41,833 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 2012 transitions. [2021-08-21 13:28:41,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2012 transitions. [2021-08-21 13:28:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:41,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:41,835 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] [2021-08-21 13:28:41,870 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 13:28:42,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 13:28:42,051 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1300580014, now seen corresponding path program 17 times [2021-08-21 13:28:42,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:42,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512933794] [2021-08-21 13:28:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:42,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:42,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:42,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512933794] [2021-08-21 13:28:42,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512933794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:42,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4786919] [2021-08-21 13:28:42,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:42,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:42,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:42,141 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 13:28:42,144 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 13:28:42,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:42,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:42,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:42,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4786919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:42,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:42,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:42,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806901724] [2021-08-21 13:28:42,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:42,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:42,476 INFO L87 Difference]: Start difference. First operand 645 states and 2012 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:42,559 INFO L93 Difference]: Finished difference Result 792 states and 2461 transitions. [2021-08-21 13:28:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:42,562 INFO L225 Difference]: With dead ends: 792 [2021-08-21 13:28:42,562 INFO L226 Difference]: Without dead ends: 716 [2021-08-21 13:28:42,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-21 13:28:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 666. [2021-08-21 13:28:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.093233082706767) internal successors, (2057), 665 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2057 transitions. [2021-08-21 13:28:42,571 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2057 transitions. Word has length 20 [2021-08-21 13:28:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:42,571 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 2057 transitions. [2021-08-21 13:28:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2057 transitions. [2021-08-21 13:28:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:42,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:42,573 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] [2021-08-21 13:28:42,609 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 13:28:42,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 13:28:42,790 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:42,790 INFO L82 PathProgramCache]: Analyzing trace with hash -13245766, now seen corresponding path program 18 times [2021-08-21 13:28:42,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:42,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84301160] [2021-08-21 13:28:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:42,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:42,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:42,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84301160] [2021-08-21 13:28:42,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84301160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:42,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562955231] [2021-08-21 13:28:42,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:42,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:42,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:42,857 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 13:28:42,911 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 13:28:43,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:28:43,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:43,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562955231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:43,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:43,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:43,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617031577] [2021-08-21 13:28:43,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:43,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:43,287 INFO L87 Difference]: Start difference. First operand 666 states and 2057 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:43,374 INFO L93 Difference]: Finished difference Result 810 states and 2486 transitions. [2021-08-21 13:28:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:43,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:43,377 INFO L225 Difference]: With dead ends: 810 [2021-08-21 13:28:43,377 INFO L226 Difference]: Without dead ends: 775 [2021-08-21 13:28:43,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-08-21 13:28:43,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 687. [2021-08-21 13:28:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.107871720116618) internal successors, (2132), 686 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2132 transitions. [2021-08-21 13:28:43,388 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2132 transitions. Word has length 20 [2021-08-21 13:28:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:43,388 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 2132 transitions. [2021-08-21 13:28:43,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2132 transitions. [2021-08-21 13:28:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:43,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:43,389 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] [2021-08-21 13:28:43,406 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 13:28:43,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:43,606 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:43,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1986168834, now seen corresponding path program 19 times [2021-08-21 13:28:43,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:43,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584916614] [2021-08-21 13:28:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:43,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:43,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:43,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584916614] [2021-08-21 13:28:43,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584916614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:43,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778423404] [2021-08-21 13:28:43,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:43,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:43,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:43,693 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 13:28:43,718 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 13:28:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:44,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778423404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:44,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:44,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:44,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608781140] [2021-08-21 13:28:44,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:44,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:44,109 INFO L87 Difference]: Start difference. First operand 687 states and 2132 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:44,196 INFO L93 Difference]: Finished difference Result 874 states and 2701 transitions. [2021-08-21 13:28:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:44,199 INFO L225 Difference]: With dead ends: 874 [2021-08-21 13:28:44,199 INFO L226 Difference]: Without dead ends: 858 [2021-08-21 13:28:44,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-08-21 13:28:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 785. [2021-08-21 13:28:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.1683673469387754) internal successors, (2484), 784 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2484 transitions. [2021-08-21 13:28:44,212 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2484 transitions. Word has length 20 [2021-08-21 13:28:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:44,212 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2484 transitions. [2021-08-21 13:28:44,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2484 transitions. [2021-08-21 13:28:44,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:44,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:44,214 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] [2021-08-21 13:28:44,246 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 13:28:44,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:44,446 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1158873366, now seen corresponding path program 20 times [2021-08-21 13:28:44,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:44,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297132433] [2021-08-21 13:28:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:44,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:44,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:44,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297132433] [2021-08-21 13:28:44,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297132433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:44,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484064407] [2021-08-21 13:28:44,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:44,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:44,541 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 13:28:44,587 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 13:28:44,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:44,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:44,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484064407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:44,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:44,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:44,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524154127] [2021-08-21 13:28:44,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:44,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:44,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:44,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:44,965 INFO L87 Difference]: Start difference. First operand 785 states and 2484 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:45,054 INFO L93 Difference]: Finished difference Result 991 states and 3119 transitions. [2021-08-21 13:28:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:45,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:45,058 INFO L225 Difference]: With dead ends: 991 [2021-08-21 13:28:45,058 INFO L226 Difference]: Without dead ends: 952 [2021-08-21 13:28:45,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-08-21 13:28:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 880. [2021-08-21 13:28:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.2127417519908987) internal successors, (2824), 879 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2824 transitions. [2021-08-21 13:28:45,071 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2824 transitions. Word has length 20 [2021-08-21 13:28:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:45,071 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2824 transitions. [2021-08-21 13:28:45,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2824 transitions. [2021-08-21 13:28:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:45,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:45,073 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] [2021-08-21 13:28:45,105 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 13:28:45,289 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,SelfDestructingSolverStorable31 [2021-08-21 13:28:45,289 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1432693318, now seen corresponding path program 21 times [2021-08-21 13:28:45,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:45,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558473447] [2021-08-21 13:28:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:45,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:45,375 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 13:28:45,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:45,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558473447] [2021-08-21 13:28:45,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558473447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:45,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356762467] [2021-08-21 13:28:45,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:45,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:45,376 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 13:28:45,378 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 13:28:45,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:45,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:45,801 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 13:28:45,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356762467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:45,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:45,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:45,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667487577] [2021-08-21 13:28:45,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:45,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:45,802 INFO L87 Difference]: Start difference. First operand 880 states and 2824 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:45,886 INFO L93 Difference]: Finished difference Result 1129 states and 3575 transitions. [2021-08-21 13:28:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:45,890 INFO L225 Difference]: With dead ends: 1129 [2021-08-21 13:28:45,890 INFO L226 Difference]: Without dead ends: 1039 [2021-08-21 13:28:45,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-08-21 13:28:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1025. [2021-08-21 13:28:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.1982421875) internal successors, (3275), 1024 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3275 transitions. [2021-08-21 13:28:45,904 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3275 transitions. Word has length 20 [2021-08-21 13:28:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:45,904 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 3275 transitions. [2021-08-21 13:28:45,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3275 transitions. [2021-08-21 13:28:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:45,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:45,906 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] [2021-08-21 13:28:45,943 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 13:28:46,121 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,SelfDestructingSolverStorable32 [2021-08-21 13:28:46,122 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash -812145178, now seen corresponding path program 22 times [2021-08-21 13:28:46,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:46,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813354863] [2021-08-21 13:28:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:46,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:46,189 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 13:28:46,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:46,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813354863] [2021-08-21 13:28:46,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813354863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:46,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128140012] [2021-08-21 13:28:46,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:46,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:46,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:46,205 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 13:28:46,229 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 13:28:46,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:46,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:46,629 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 13:28:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128140012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:46,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:46,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:46,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368797634] [2021-08-21 13:28:46,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:46,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:46,630 INFO L87 Difference]: Start difference. First operand 1025 states and 3275 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:46,724 INFO L93 Difference]: Finished difference Result 1401 states and 4441 transitions. [2021-08-21 13:28:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:46,729 INFO L225 Difference]: With dead ends: 1401 [2021-08-21 13:28:46,729 INFO L226 Difference]: Without dead ends: 1331 [2021-08-21 13:28:46,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-08-21 13:28:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1318. [2021-08-21 13:28:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.1776765375854215) internal successors, (4185), 1317 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4185 transitions. [2021-08-21 13:28:46,749 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4185 transitions. Word has length 20 [2021-08-21 13:28:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:46,749 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 4185 transitions. [2021-08-21 13:28:46,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4185 transitions. [2021-08-21 13:28:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:46,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:46,751 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] [2021-08-21 13:28:46,770 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 13:28:46,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:46,968 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1502636136, now seen corresponding path program 23 times [2021-08-21 13:28:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:46,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780133920] [2021-08-21 13:28:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:46,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:47,035 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 13:28:47,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:47,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780133920] [2021-08-21 13:28:47,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780133920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:47,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391913452] [2021-08-21 13:28:47,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:47,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:47,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:47,053 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 13:28:47,067 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 13:28:47,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:28:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:47,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:47,511 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 13:28:47,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391913452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:47,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:47,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:47,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082698595] [2021-08-21 13:28:47,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:47,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:47,512 INFO L87 Difference]: Start difference. First operand 1318 states and 4185 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:47,609 INFO L93 Difference]: Finished difference Result 1585 states and 4997 transitions. [2021-08-21 13:28:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:47,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:47,615 INFO L225 Difference]: With dead ends: 1585 [2021-08-21 13:28:47,615 INFO L226 Difference]: Without dead ends: 1561 [2021-08-21 13:28:47,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-08-21 13:28:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1490. [2021-08-21 13:28:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.1967763599731365) internal successors, (4760), 1489 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4760 transitions. [2021-08-21 13:28:47,641 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4760 transitions. Word has length 20 [2021-08-21 13:28:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:47,642 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 4760 transitions. [2021-08-21 13:28:47,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4760 transitions. [2021-08-21 13:28:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:28:47,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:47,644 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] [2021-08-21 13:28:47,683 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 13:28:47,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:47,861 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1918076500, now seen corresponding path program 24 times [2021-08-21 13:28:47,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:47,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234019341] [2021-08-21 13:28:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:47,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:47,935 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 13:28:47,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:47,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234019341] [2021-08-21 13:28:47,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234019341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:47,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702703062] [2021-08-21 13:28:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:47,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:47,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:47,936 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 13:28:47,937 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 13:28:48,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:28:48,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:28:48,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:48,372 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 13:28:48,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702703062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:48,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:48,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:28:48,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885643029] [2021-08-21 13:28:48,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:28:48,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:48,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:28:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:48,374 INFO L87 Difference]: Start difference. First operand 1490 states and 4760 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:48,472 INFO L93 Difference]: Finished difference Result 1754 states and 5570 transitions. [2021-08-21 13:28:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:28:48,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:28:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:48,475 INFO L225 Difference]: With dead ends: 1754 [2021-08-21 13:28:48,475 INFO L226 Difference]: Without dead ends: 1656 [2021-08-21 13:28:48,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:28:48,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-08-21 13:28:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1609. [2021-08-21 13:28:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 3.220771144278607) internal successors, (5179), 1608 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5179 transitions. [2021-08-21 13:28:48,497 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5179 transitions. Word has length 20 [2021-08-21 13:28:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:48,497 INFO L470 AbstractCegarLoop]: Abstraction has 1609 states and 5179 transitions. [2021-08-21 13:28:48,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5179 transitions. [2021-08-21 13:28:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:28:48,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:48,500 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:48,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:48,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 13:28:48,713 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash -891845262, now seen corresponding path program 25 times [2021-08-21 13:28:48,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:48,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189136831] [2021-08-21 13:28:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:48,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:28:48,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:48,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189136831] [2021-08-21 13:28:48,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189136831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:48,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019371272] [2021-08-21 13:28:48,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:48,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:48,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:48,803 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:48,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 13:28:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:49,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:28:49,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:28:49,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019371272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:49,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:49,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 13:28:49,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836442115] [2021-08-21 13:28:49,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:28:49,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:28:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:49,264 INFO L87 Difference]: Start difference. First operand 1609 states and 5179 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:49,390 INFO L93 Difference]: Finished difference Result 1770 states and 5609 transitions. [2021-08-21 13:28:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:28:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 13:28:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:49,394 INFO L225 Difference]: With dead ends: 1770 [2021-08-21 13:28:49,394 INFO L226 Difference]: Without dead ends: 1658 [2021-08-21 13:28:49,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-08-21 13:28:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1429. [2021-08-21 13:28:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.130252100840336) internal successors, (4470), 1428 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4470 transitions. [2021-08-21 13:28:49,413 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4470 transitions. Word has length 23 [2021-08-21 13:28:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:49,413 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 4470 transitions. [2021-08-21 13:28:49,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4470 transitions. [2021-08-21 13:28:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:28:49,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:49,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:49,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:49,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 13:28:49,632 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1582336220, now seen corresponding path program 26 times [2021-08-21 13:28:49,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:49,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372729132] [2021-08-21 13:28:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:49,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:28:49,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:49,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372729132] [2021-08-21 13:28:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372729132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:49,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737110427] [2021-08-21 13:28:49,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:49,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:49,708 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:49,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 13:28:50,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:50,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:28:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:28:50,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737110427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:50,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:50,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 13:28:50,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423432880] [2021-08-21 13:28:50,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:28:50,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:50,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:28:50,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:50,210 INFO L87 Difference]: Start difference. First operand 1429 states and 4470 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:50,329 INFO L93 Difference]: Finished difference Result 1614 states and 4971 transitions. [2021-08-21 13:28:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:28:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 13:28:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:50,332 INFO L225 Difference]: With dead ends: 1614 [2021-08-21 13:28:50,332 INFO L226 Difference]: Without dead ends: 1506 [2021-08-21 13:28:50,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-08-21 13:28:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1071. [2021-08-21 13:28:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 3.041121495327103) internal successors, (3254), 1070 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 3254 transitions. [2021-08-21 13:28:50,348 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 3254 transitions. Word has length 23 [2021-08-21 13:28:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:50,349 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 3254 transitions. [2021-08-21 13:28:50,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 3254 transitions. [2021-08-21 13:28:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:28:50,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:50,350 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:50,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:50,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 13:28:50,567 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:50,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1838376416, now seen corresponding path program 27 times [2021-08-21 13:28:50,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:50,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382503332] [2021-08-21 13:28:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:50,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:28:50,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:50,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382503332] [2021-08-21 13:28:50,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382503332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:50,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198846463] [2021-08-21 13:28:50,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:50,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:50,669 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:50,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 13:28:51,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:28:51,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:28:51,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198846463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:51,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:51,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 13:28:51,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092253897] [2021-08-21 13:28:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:28:51,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:28:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:51,202 INFO L87 Difference]: Start difference. First operand 1071 states and 3254 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:51,319 INFO L93 Difference]: Finished difference Result 1223 states and 3704 transitions. [2021-08-21 13:28:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:28:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 13:28:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:51,321 INFO L225 Difference]: With dead ends: 1223 [2021-08-21 13:28:51,321 INFO L226 Difference]: Without dead ends: 1039 [2021-08-21 13:28:51,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-08-21 13:28:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 304. [2021-08-21 13:28:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9603960396039604) internal successors, (897), 303 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-08-21 13:28:51,328 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 23 [2021-08-21 13:28:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:51,328 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-08-21 13:28:51,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-08-21 13:28:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:28:51,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:51,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:51,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:51,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 13:28:51,546 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash -298846684, now seen corresponding path program 28 times [2021-08-21 13:28:51,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:51,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052638134] [2021-08-21 13:28:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:51,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:51,625 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 13:28:51,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:51,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052638134] [2021-08-21 13:28:51,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052638134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:51,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432424605] [2021-08-21 13:28:51,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:51,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:51,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:51,626 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:51,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 13:28:52,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:52,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:28:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:52,179 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 13:28:52,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432424605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:52,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:52,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 13:28:52,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269271221] [2021-08-21 13:28:52,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:28:52,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:28:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:52,180 INFO L87 Difference]: Start difference. First operand 304 states and 897 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:52,321 INFO L93 Difference]: Finished difference Result 552 states and 1635 transitions. [2021-08-21 13:28:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:28:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 13:28:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:52,323 INFO L225 Difference]: With dead ends: 552 [2021-08-21 13:28:52,323 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 13:28:52,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:28:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 13:28:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2021-08-21 13:28:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.9825581395348837) internal successors, (1539), 516 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1539 transitions. [2021-08-21 13:28:52,333 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1539 transitions. Word has length 23 [2021-08-21 13:28:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:52,333 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1539 transitions. [2021-08-21 13:28:52,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1539 transitions. [2021-08-21 13:28:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:28:52,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:52,334 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:52,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 13:28:52,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 13:28:52,539 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -778131360, now seen corresponding path program 29 times [2021-08-21 13:28:52,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:52,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82595017] [2021-08-21 13:28:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:52,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:52,635 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 13:28:52,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:52,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82595017] [2021-08-21 13:28:52,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82595017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:52,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728597516] [2021-08-21 13:28:52,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:52,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:52,637 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:52,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 13:28:53,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:28:53,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:28:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:53,180 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 13:28:53,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728597516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:53,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:53,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 13:28:53,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584179204] [2021-08-21 13:28:53,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:28:53,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:28:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:28:53,181 INFO L87 Difference]: Start difference. First operand 517 states and 1539 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 13:28:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:53,320 INFO L93 Difference]: Finished difference Result 516 states and 1538 transitions. [2021-08-21 13:28:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:28:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 13:28:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:53,321 INFO L225 Difference]: With dead ends: 516 [2021-08-21 13:28:53,321 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 13:28:53,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:28:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 13:28:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 13:28:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 13:28:53,321 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-08-21 13:28:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:53,321 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 13:28:53,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 13:28:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 13:28:53,321 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 13:28:53,323 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:28:53,324 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:28:53,324 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:28:53,324 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:28:53,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:53,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:53,553 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:28:53,553 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:28:53,554 INFO L202 PluginConnector]: Adding new model add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:28:53 BasicIcfg [2021-08-21 13:28:53,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:28:53,555 INFO L168 Benchmark]: Toolchain (without parser) took 23313.17 ms. Allocated memory was 209.7 MB in the beginning and 588.3 MB in the end (delta: 378.5 MB). Free memory was 190.4 MB in the beginning and 333.0 MB in the end (delta: -142.6 MB). Peak memory consumption was 236.3 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:53,555 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 209.7 MB. Free memory is still 191.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:28:53,555 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.47 ms. Allocated memory is still 209.7 MB. Free memory was 190.2 MB in the beginning and 188.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:53,556 INFO L168 Benchmark]: Boogie Preprocessor took 8.94 ms. Allocated memory is still 209.7 MB. Free memory was 188.7 MB in the beginning and 187.8 MB in the end (delta: 861.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:53,556 INFO L168 Benchmark]: RCFGBuilder took 144.92 ms. Allocated memory is still 209.7 MB. Free memory was 187.8 MB in the beginning and 178.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:53,556 INFO L168 Benchmark]: TraceAbstraction took 23135.13 ms. Allocated memory was 209.7 MB in the beginning and 588.3 MB in the end (delta: 378.5 MB). Free memory was 178.2 MB in the beginning and 333.0 MB in the end (delta: -154.8 MB). Peak memory consumption was 224.8 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:53,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 209.7 MB. Free memory is still 191.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.47 ms. Allocated memory is still 209.7 MB. Free memory was 190.2 MB in the beginning and 188.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 8.94 ms. Allocated memory is still 209.7 MB. Free memory was 188.7 MB in the beginning and 187.8 MB in the end (delta: 861.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 144.92 ms. Allocated memory is still 209.7 MB. Free memory was 187.8 MB in the beginning and 178.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23135.13 ms. Allocated memory was 209.7 MB in the beginning and 588.3 MB in the end (delta: 378.5 MB). Free memory was 178.2 MB in the beginning and 333.0 MB in the end (delta: -154.8 MB). Peak memory consumption was 224.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 30 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 23012.1ms, OverallIterations: 41, TraceHistogramMax: 2, EmptinessCheckTime: 49.8ms, AutomataDifference: 3081.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1343 SDtfs, 670 SDslu, 4142 SDs, 0 SdLazy, 5115 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2055.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 820 GetRequests, 553 SyntacticMatches, 69 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1246.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1609occurred in iteration=36, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 387.8ms AutomataMinimizationTime, 41 MinimizatonAttempts, 3357 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.2ms SsaConstructionTime, 285.5ms SatisfiabilityAnalysisTime, 5929.4ms InterpolantComputationTime, 1370 NumberOfCodeBlocks, 1370 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 1300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9848 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1373 ConjunctsInSsa, 443 ConjunctsInUnsatCore, 70 InterpolantComputations, 12 PerfectInterpolantSequences, 88/230 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 13:28:53,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...