/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/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:13:35,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:13:35,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:13:35,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-03 19:13:35,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-03 19:13:35,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-03 19:13:35,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-03 19:13:35,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-03 19:13:35,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-03 19:13:35,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-03 19:13:35,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-03 19:13:36,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-03 19:13:36,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:13:36,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:13:36,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:13:36,029 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 [2022-03-03 19:13:36,049 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:13:36,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:13:36,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:13:36,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:13:36,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:13:36,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:13:36,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:13:36,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:13:36,050 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:13:36,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:13:36,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:13:36,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:13:36,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:13:36,052 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:13:36,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:13:36,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:13:36,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:13:36,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:13:36,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:13:36,228 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:13:36,243 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:13:36,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2022-03-03 19:13:36,246 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2022-03-03 19:13:36,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:13:36,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:13:36,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:13:36,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:13:36,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:13:36,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,286 INFO L137 Inliner]: procedures = 6, calls = 5, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:13:36,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:13:36,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:13:36,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:13:36,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:13:36,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:13:36,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:13:36,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:13:36,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:13:36,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/1) ... [2022-03-03 19:13:36,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:13:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:36,323 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) [2022-03-03 19:13:36,346 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 [2022-03-03 19:13:36,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:13:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:13:36,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:13:36,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:13:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:13:36,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:13:36,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:13:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:13:36,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:13:36,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:13:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:13:36,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:13:36,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-03 19:13:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-03 19:13:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-03 19:13:36,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-03-03 19:13:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-03-03 19:13:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-03-03 19:13:36,369 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:13:36,407 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:13:36,408 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:13:36,483 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:13:36,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:13:36,500 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:13:36,508 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:13:36 BoogieIcfgContainer [2022-03-03 19:13:36,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:13:36,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:13:36,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:13:36,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:13:36,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:13:36" (1/2) ... [2022-03-03 19:13:36,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0392ef and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:13:36, skipping insertion in model container [2022-03-03 19:13:36,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:13:36" (2/2) ... [2022-03-03 19:13:36,518 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2022-03-03 19:13:36,520 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:13:36,521 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:13:36,521 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:13:36,521 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:13:36,580 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-03-03 19:13:36,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:13:36,633 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:13:36,633 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-03-03 19:13:36,644 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2022-03-03 19:13:36,964 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:13:37,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:37,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:37,037 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:37,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2136423211, now seen corresponding path program 1 times [2022-03-03 19:13:37,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:37,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833977141] [2022-03-03 19:13:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:37,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:37,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:37,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833977141] [2022-03-03 19:13:37,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833977141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:37,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:37,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:13:37,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162598630] [2022-03-03 19:13:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:37,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:13:37,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:13:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:37,227 INFO L87 Difference]: Start difference. First operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:37,739 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2022-03-03 19:13:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:13:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:13:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:38,131 INFO L225 Difference]: With dead ends: 23171 [2022-03-03 19:13:38,131 INFO L226 Difference]: Without dead ends: 15763 [2022-03-03 19:13:38,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:13:38,134 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 135 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:38,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 264 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2022-03-03 19:13:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2022-03-03 19:13:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2022-03-03 19:13:38,691 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2022-03-03 19:13:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:38,691 INFO L470 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2022-03-03 19:13:38,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2022-03-03 19:13:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:13:38,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:38,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:38,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:13:38,713 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1694783063, now seen corresponding path program 2 times [2022-03-03 19:13:38,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:38,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226371073] [2022-03-03 19:13:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:38,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:38,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226371073] [2022-03-03 19:13:38,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226371073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:38,764 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:38,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:38,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475334799] [2022-03-03 19:13:38,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:38,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:38,767 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:38,947 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2022-03-03 19:13:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:13:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:38,983 INFO L225 Difference]: With dead ends: 9446 [2022-03-03 19:13:38,983 INFO L226 Difference]: Without dead ends: 6583 [2022-03-03 19:13:38,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:38,988 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:38,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 126 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:13:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-03-03 19:13:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2022-03-03 19:13:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2022-03-03 19:13:39,223 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2022-03-03 19:13:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:39,224 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2022-03-03 19:13:39,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2022-03-03 19:13:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:13:39,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:39,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:39,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:13:39,243 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:39,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1387431189, now seen corresponding path program 3 times [2022-03-03 19:13:39,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:39,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168780920] [2022-03-03 19:13:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:39,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:39,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:39,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168780920] [2022-03-03 19:13:39,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168780920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:39,295 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:39,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:13:39,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223929544] [2022-03-03 19:13:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:39,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:13:39,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:13:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:39,296 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:39,641 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2022-03-03 19:13:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:13:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:13:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:39,709 INFO L225 Difference]: With dead ends: 22801 [2022-03-03 19:13:39,709 INFO L226 Difference]: Without dead ends: 16593 [2022-03-03 19:13:39,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:13:39,714 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 117 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:39,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 273 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2022-03-03 19:13:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2022-03-03 19:13:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2022-03-03 19:13:40,169 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2022-03-03 19:13:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:40,170 INFO L470 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2022-03-03 19:13:40,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2022-03-03 19:13:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:13:40,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:40,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:40,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:13:40,191 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1055757637, now seen corresponding path program 4 times [2022-03-03 19:13:40,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:40,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694965011] [2022-03-03 19:13:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:40,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:40,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694965011] [2022-03-03 19:13:40,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694965011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:40,237 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:40,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:40,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654578220] [2022-03-03 19:13:40,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:40,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:40,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:40,238 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:40,324 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2022-03-03 19:13:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:13:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:40,350 INFO L225 Difference]: With dead ends: 8424 [2022-03-03 19:13:40,350 INFO L226 Difference]: Without dead ends: 6361 [2022-03-03 19:13:40,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:40,353 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:40,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 121 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:13:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2022-03-03 19:13:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2022-03-03 19:13:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2022-03-03 19:13:40,604 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2022-03-03 19:13:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:40,604 INFO L470 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2022-03-03 19:13:40,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2022-03-03 19:13:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:40,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:40,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:40,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:13:40,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash 243141281, now seen corresponding path program 1 times [2022-03-03 19:13:40,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:40,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874930558] [2022-03-03 19:13:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:40,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:40,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:40,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874930558] [2022-03-03 19:13:40,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874930558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:40,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48178304] [2022-03-03 19:13:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:40,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:40,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:40,705 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) [2022-03-03 19:13:40,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:13:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:40,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:13:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:40,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:40,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48178304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:40,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:40,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-03 19:13:40,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597484745] [2022-03-03 19:13:40,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:40,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:13:40,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:13:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:13:40,914 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:41,078 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2022-03-03 19:13:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:13:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:41,129 INFO L225 Difference]: With dead ends: 13742 [2022-03-03 19:13:41,130 INFO L226 Difference]: Without dead ends: 13742 [2022-03-03 19:13:41,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:13:41,131 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:41,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 115 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2022-03-03 19:13:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2022-03-03 19:13:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2022-03-03 19:13:41,413 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2022-03-03 19:13:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:41,413 INFO L470 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2022-03-03 19:13:41,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2022-03-03 19:13:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:41,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:41,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:41,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:41,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:41,637 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1679087144, now seen corresponding path program 1 times [2022-03-03 19:13:41,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:41,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359714756] [2022-03-03 19:13:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:41,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:41,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:41,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359714756] [2022-03-03 19:13:41,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359714756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:41,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661827391] [2022-03-03 19:13:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:41,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:41,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:41,718 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) [2022-03-03 19:13:41,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:13:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:13:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:41,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:13:41,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661827391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:41,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:13:41,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-03-03 19:13:41,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76847020] [2022-03-03 19:13:41,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:41,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:41,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:13:41,819 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:42,032 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2022-03-03 19:13:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:42,077 INFO L225 Difference]: With dead ends: 11412 [2022-03-03 19:13:42,077 INFO L226 Difference]: Without dead ends: 11118 [2022-03-03 19:13:42,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:13:42,079 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:42,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2022-03-03 19:13:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2022-03-03 19:13:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2022-03-03 19:13:42,310 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2022-03-03 19:13:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:42,311 INFO L470 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2022-03-03 19:13:42,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2022-03-03 19:13:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:42,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:42,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:42,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-03 19:13:42,532 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,SelfDestructingSolverStorable5 [2022-03-03 19:13:42,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash -43418172, now seen corresponding path program 1 times [2022-03-03 19:13:42,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:42,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129446038] [2022-03-03 19:13:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:42,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:42,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129446038] [2022-03-03 19:13:42,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129446038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:42,566 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:42,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:42,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135355261] [2022-03-03 19:13:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:42,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:42,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:42,567 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:42,707 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2022-03-03 19:13:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:42,760 INFO L225 Difference]: With dead ends: 15516 [2022-03-03 19:13:42,760 INFO L226 Difference]: Without dead ends: 15386 [2022-03-03 19:13:42,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:42,761 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:42,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 79 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2022-03-03 19:13:43,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2022-03-03 19:13:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2022-03-03 19:13:43,379 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2022-03-03 19:13:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:43,379 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2022-03-03 19:13:43,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2022-03-03 19:13:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:43,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:43,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-03 19:13:43,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 895564249, now seen corresponding path program 1 times [2022-03-03 19:13:43,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:43,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700874914] [2022-03-03 19:13:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:43,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:43,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:43,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700874914] [2022-03-03 19:13:43,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700874914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:43,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:43,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:43,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305727600] [2022-03-03 19:13:43,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:43,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:43,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:43,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:43,440 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:43,659 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2022-03-03 19:13:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:43,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:43,746 INFO L225 Difference]: With dead ends: 22857 [2022-03-03 19:13:43,746 INFO L226 Difference]: Without dead ends: 22667 [2022-03-03 19:13:43,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:43,747 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:43,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2022-03-03 19:13:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2022-03-03 19:13:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2022-03-03 19:13:44,448 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2022-03-03 19:13:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:44,448 INFO L470 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2022-03-03 19:13:44,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2022-03-03 19:13:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:44,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:44,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:44,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-03 19:13:44,488 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:44,489 INFO L85 PathProgramCache]: Analyzing trace with hash -667683816, now seen corresponding path program 2 times [2022-03-03 19:13:44,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:44,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25841428] [2022-03-03 19:13:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:44,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:44,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:44,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25841428] [2022-03-03 19:13:44,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25841428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:44,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711473893] [2022-03-03 19:13:44,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:13:44,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:44,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:44,559 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) [2022-03-03 19:13:44,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:13:44,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:44,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:44,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:13:44,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:44,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711473893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:44,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:44,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 8 [2022-03-03 19:13:44,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731838381] [2022-03-03 19:13:44,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:44,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:13:44,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:13:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:13:44,688 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:45,856 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2022-03-03 19:13:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:13:45,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:46,282 INFO L225 Difference]: With dead ends: 64631 [2022-03-03 19:13:46,283 INFO L226 Difference]: Without dead ends: 50671 [2022-03-03 19:13:46,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:13:46,285 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 496 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:46,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 497 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:13:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2022-03-03 19:13:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2022-03-03 19:13:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2022-03-03 19:13:47,357 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2022-03-03 19:13:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:47,357 INFO L470 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2022-03-03 19:13:47,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:47,357 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2022-03-03 19:13:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:47,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:47,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:47,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:47,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:47,622 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash 990425401, now seen corresponding path program 2 times [2022-03-03 19:13:47,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:47,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252986395] [2022-03-03 19:13:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:47,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:47,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252986395] [2022-03-03 19:13:47,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252986395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:47,651 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:47,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:47,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922723306] [2022-03-03 19:13:47,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:47,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:47,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:47,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:47,652 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:48,029 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2022-03-03 19:13:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:48,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:48,131 INFO L225 Difference]: With dead ends: 27166 [2022-03-03 19:13:48,131 INFO L226 Difference]: Without dead ends: 26834 [2022-03-03 19:13:48,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:48,132 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:48,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 83 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:13:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2022-03-03 19:13:48,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2022-03-03 19:13:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2022-03-03 19:13:48,965 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2022-03-03 19:13:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:48,966 INFO L470 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2022-03-03 19:13:48,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2022-03-03 19:13:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:49,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:49,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:49,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-03 19:13:49,045 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash 781962112, now seen corresponding path program 2 times [2022-03-03 19:13:49,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:49,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321192544] [2022-03-03 19:13:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:49,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:49,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:49,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321192544] [2022-03-03 19:13:49,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321192544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:49,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:49,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:49,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6981102] [2022-03-03 19:13:49,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:49,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:49,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:49,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:49,085 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:49,258 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2022-03-03 19:13:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:13:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:49,338 INFO L225 Difference]: With dead ends: 24325 [2022-03-03 19:13:49,338 INFO L226 Difference]: Without dead ends: 24325 [2022-03-03 19:13:49,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:49,339 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:49,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 71 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:13:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2022-03-03 19:13:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2022-03-03 19:13:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2022-03-03 19:13:50,085 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2022-03-03 19:13:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:50,085 INFO L470 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2022-03-03 19:13:50,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2022-03-03 19:13:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:50,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:50,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:50,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-03 19:13:50,133 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2141067490, now seen corresponding path program 3 times [2022-03-03 19:13:50,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:50,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309012344] [2022-03-03 19:13:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:50,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:50,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:50,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309012344] [2022-03-03 19:13:50,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309012344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:50,178 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:50,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:13:50,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157266684] [2022-03-03 19:13:50,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:50,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:13:50,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:50,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:13:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:50,179 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:50,337 INFO L93 Difference]: Finished difference Result 22070 states and 97895 transitions. [2022-03-03 19:13:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:50,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:50,403 INFO L225 Difference]: With dead ends: 22070 [2022-03-03 19:13:50,403 INFO L226 Difference]: Without dead ends: 19364 [2022-03-03 19:13:50,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:50,403 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 100 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:50,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 76 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:13:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19364 states. [2022-03-03 19:13:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19364 to 13869. [2022-03-03 19:13:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13869 states, 13868 states have (on average 4.429838477069513) internal successors, (61433), 13868 states have internal predecessors, (61433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13869 states to 13869 states and 61433 transitions. [2022-03-03 19:13:50,952 INFO L78 Accepts]: Start accepts. Automaton has 13869 states and 61433 transitions. Word has length 30 [2022-03-03 19:13:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:50,952 INFO L470 AbstractCegarLoop]: Abstraction has 13869 states and 61433 transitions. [2022-03-03 19:13:50,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states and 61433 transitions. [2022-03-03 19:13:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:50,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:50,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:50,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-03 19:13:50,984 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash 169041953, now seen corresponding path program 2 times [2022-03-03 19:13:50,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:50,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580436740] [2022-03-03 19:13:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:50,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:51,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:51,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580436740] [2022-03-03 19:13:51,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580436740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:51,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:51,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:51,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339848363] [2022-03-03 19:13:51,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:51,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:51,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:51,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:51,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:51,003 INFO L87 Difference]: Start difference. First operand 13869 states and 61433 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:51,321 INFO L93 Difference]: Finished difference Result 20880 states and 90831 transitions. [2022-03-03 19:13:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:51,386 INFO L225 Difference]: With dead ends: 20880 [2022-03-03 19:13:51,386 INFO L226 Difference]: Without dead ends: 20521 [2022-03-03 19:13:51,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:51,387 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 82 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:51,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 81 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20521 states. [2022-03-03 19:13:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20521 to 15337. [2022-03-03 19:13:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15337 states, 15336 states have (on average 4.414906103286385) internal successors, (67707), 15336 states have internal predecessors, (67707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15337 states to 15337 states and 67707 transitions. [2022-03-03 19:13:51,882 INFO L78 Accepts]: Start accepts. Automaton has 15337 states and 67707 transitions. Word has length 30 [2022-03-03 19:13:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:51,882 INFO L470 AbstractCegarLoop]: Abstraction has 15337 states and 67707 transitions. [2022-03-03 19:13:51,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 15337 states and 67707 transitions. [2022-03-03 19:13:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:51,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:51,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:51,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-03 19:13:51,915 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1432170691, now seen corresponding path program 3 times [2022-03-03 19:13:51,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:51,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843712823] [2022-03-03 19:13:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:51,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:51,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:51,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843712823] [2022-03-03 19:13:51,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843712823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:51,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:51,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:13:51,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478876992] [2022-03-03 19:13:51,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:51,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:13:51,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:51,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:13:51,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:51,961 INFO L87 Difference]: Start difference. First operand 15337 states and 67707 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:52,110 INFO L93 Difference]: Finished difference Result 19356 states and 85625 transitions. [2022-03-03 19:13:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:52,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:52,162 INFO L225 Difference]: With dead ends: 19356 [2022-03-03 19:13:52,163 INFO L226 Difference]: Without dead ends: 17254 [2022-03-03 19:13:52,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:52,163 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 74 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:52,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 101 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:52,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2022-03-03 19:13:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 13238. [2022-03-03 19:13:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13238 states, 13237 states have (on average 4.481755684822845) internal successors, (59325), 13237 states have internal predecessors, (59325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13238 states to 13238 states and 59325 transitions. [2022-03-03 19:13:52,590 INFO L78 Accepts]: Start accepts. Automaton has 13238 states and 59325 transitions. Word has length 30 [2022-03-03 19:13:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:52,590 INFO L470 AbstractCegarLoop]: Abstraction has 13238 states and 59325 transitions. [2022-03-03 19:13:52,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13238 states and 59325 transitions. [2022-03-03 19:13:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:13:52,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:52,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:52,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-03 19:13:52,619 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash -576259964, now seen corresponding path program 3 times [2022-03-03 19:13:52,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:52,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633387875] [2022-03-03 19:13:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:52,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:52,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:52,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633387875] [2022-03-03 19:13:52,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633387875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:13:52,643 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:13:52,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:13:52,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122729738] [2022-03-03 19:13:52,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:52,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:13:52,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:52,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:13:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:13:52,644 INFO L87 Difference]: Start difference. First operand 13238 states and 59325 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:52,770 INFO L93 Difference]: Finished difference Result 14893 states and 67180 transitions. [2022-03-03 19:13:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:13:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:13:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:52,816 INFO L225 Difference]: With dead ends: 14893 [2022-03-03 19:13:52,816 INFO L226 Difference]: Without dead ends: 13819 [2022-03-03 19:13:52,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:13:52,817 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:52,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 82 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:13:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13819 states. [2022-03-03 19:13:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13819 to 10861. [2022-03-03 19:13:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 4.560865561694291) internal successors, (49531), 10860 states have internal predecessors, (49531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 49531 transitions. [2022-03-03 19:13:53,230 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 49531 transitions. Word has length 30 [2022-03-03 19:13:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 49531 transitions. [2022-03-03 19:13:53,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 49531 transitions. [2022-03-03 19:13:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-03 19:13:53,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:53,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:53,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-03 19:13:53,253 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:53,253 INFO L85 PathProgramCache]: Analyzing trace with hash 805676669, now seen corresponding path program 1 times [2022-03-03 19:13:53,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:53,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891352501] [2022-03-03 19:13:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:53,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:53,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891352501] [2022-03-03 19:13:53,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891352501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:53,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436506657] [2022-03-03 19:13:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:53,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:53,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:53,283 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) [2022-03-03 19:13:53,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:13:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:53,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:13:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:53,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:53,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436506657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:53,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:53,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-03 19:13:53,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593828924] [2022-03-03 19:13:53,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:53,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:13:53,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:13:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:13:53,455 INFO L87 Difference]: Start difference. First operand 10861 states and 49531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:53,623 INFO L93 Difference]: Finished difference Result 16083 states and 73635 transitions. [2022-03-03 19:13:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:13:53,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-03 19:13:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:53,817 INFO L225 Difference]: With dead ends: 16083 [2022-03-03 19:13:53,817 INFO L226 Difference]: Without dead ends: 16083 [2022-03-03 19:13:53,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:13:53,818 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:53,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 128 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:13:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16083 states. [2022-03-03 19:13:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16083 to 11321. [2022-03-03 19:13:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11321 states, 11320 states have (on average 4.567667844522968) internal successors, (51706), 11320 states have internal predecessors, (51706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11321 states to 11321 states and 51706 transitions. [2022-03-03 19:13:54,057 INFO L78 Accepts]: Start accepts. Automaton has 11321 states and 51706 transitions. Word has length 36 [2022-03-03 19:13:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:54,057 INFO L470 AbstractCegarLoop]: Abstraction has 11321 states and 51706 transitions. [2022-03-03 19:13:54,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 11321 states and 51706 transitions. [2022-03-03 19:13:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:13:54,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:54,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:54,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:54,280 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,SelfDestructingSolverStorable15 [2022-03-03 19:13:54,280 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1566380201, now seen corresponding path program 1 times [2022-03-03 19:13:54,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:54,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839009751] [2022-03-03 19:13:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:54,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:54,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839009751] [2022-03-03 19:13:54,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839009751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:54,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364602541] [2022-03-03 19:13:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:54,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:54,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:54,393 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) [2022-03-03 19:13:54,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:13:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:13:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:54,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:13:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:54,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:54,920 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-03 19:13:54,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-03-03 19:13:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:54,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364602541] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:54,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:13:54,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2022-03-03 19:13:54,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949920111] [2022-03-03 19:13:54,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:13:54,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:13:54,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:54,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:13:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:13:54,924 INFO L87 Difference]: Start difference. First operand 11321 states and 51706 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:55,430 INFO L93 Difference]: Finished difference Result 32605 states and 149800 transitions. [2022-03-03 19:13:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:13:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:13:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:55,508 INFO L225 Difference]: With dead ends: 32605 [2022-03-03 19:13:55,508 INFO L226 Difference]: Without dead ends: 24592 [2022-03-03 19:13:55,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:13:55,509 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 169 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:55,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 236 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:13:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24592 states. [2022-03-03 19:13:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24592 to 12486. [2022-03-03 19:13:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12486 states, 12485 states have (on average 4.529034841810172) internal successors, (56545), 12485 states have internal predecessors, (56545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 56545 transitions. [2022-03-03 19:13:55,981 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 56545 transitions. Word has length 39 [2022-03-03 19:13:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:55,981 INFO L470 AbstractCegarLoop]: Abstraction has 12486 states and 56545 transitions. [2022-03-03 19:13:55,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 56545 transitions. [2022-03-03 19:13:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:13:56,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:56,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:56,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:56,209 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,SelfDestructingSolverStorable16 [2022-03-03 19:13:56,209 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:56,210 INFO L85 PathProgramCache]: Analyzing trace with hash -386488123, now seen corresponding path program 2 times [2022-03-03 19:13:56,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:56,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148460370] [2022-03-03 19:13:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:56,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:56,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:56,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148460370] [2022-03-03 19:13:56,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148460370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:56,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491083786] [2022-03-03 19:13:56,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:13:56,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:56,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:56,275 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) [2022-03-03 19:13:56,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:13:56,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:56,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:13:56,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:56,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:13:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:56,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:56,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491083786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:56,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:56,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-03-03 19:13:56,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361366604] [2022-03-03 19:13:56,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:56,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:13:56,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:13:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:13:56,618 INFO L87 Difference]: Start difference. First operand 12486 states and 56545 transitions. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:58,512 INFO L93 Difference]: Finished difference Result 93192 states and 432040 transitions. [2022-03-03 19:13:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:13:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:13:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:58,676 INFO L225 Difference]: With dead ends: 93192 [2022-03-03 19:13:58,676 INFO L226 Difference]: Without dead ends: 37625 [2022-03-03 19:13:58,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=882, Invalid=2658, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:13:58,677 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 666 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:58,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 882 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:13:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37625 states. [2022-03-03 19:13:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37625 to 10022. [2022-03-03 19:13:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 4.513421814190201) internal successors, (45229), 10021 states have internal predecessors, (45229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 45229 transitions. [2022-03-03 19:13:59,248 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 45229 transitions. Word has length 39 [2022-03-03 19:13:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:59,248 INFO L470 AbstractCegarLoop]: Abstraction has 10022 states and 45229 transitions. [2022-03-03 19:13:59,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 45229 transitions. [2022-03-03 19:13:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:13:59,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:59,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:13:59,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-03 19:13:59,468 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,SelfDestructingSolverStorable17 [2022-03-03 19:13:59,468 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:13:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1386302531, now seen corresponding path program 3 times [2022-03-03 19:13:59,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:59,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960466504] [2022-03-03 19:13:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:59,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:59,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960466504] [2022-03-03 19:13:59,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960466504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:59,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185786197] [2022-03-03 19:13:59,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:13:59,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:59,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:59,632 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) [2022-03-03 19:13:59,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:13:59,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:13:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:13:59,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:59,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:13:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:13:59,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:00,122 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-03 19:14:00,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-03-03 19:14:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:00,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185786197] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:00,126 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:14:00,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2022-03-03 19:14:00,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020959403] [2022-03-03 19:14:00,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:14:00,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:14:00,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:14:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:14:00,127 INFO L87 Difference]: Start difference. First operand 10022 states and 45229 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:00,667 INFO L93 Difference]: Finished difference Result 24835 states and 113521 transitions. [2022-03-03 19:14:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:14:00,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:14:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:00,730 INFO L225 Difference]: With dead ends: 24835 [2022-03-03 19:14:00,730 INFO L226 Difference]: Without dead ends: 20239 [2022-03-03 19:14:00,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:14:00,731 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 162 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:00,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 252 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:14:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20239 states. [2022-03-03 19:14:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20239 to 11948. [2022-03-03 19:14:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11948 states, 11947 states have (on average 4.500544069640914) internal successors, (53768), 11947 states have internal predecessors, (53768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11948 states to 11948 states and 53768 transitions. [2022-03-03 19:14:01,189 INFO L78 Accepts]: Start accepts. Automaton has 11948 states and 53768 transitions. Word has length 39 [2022-03-03 19:14:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:01,189 INFO L470 AbstractCegarLoop]: Abstraction has 11948 states and 53768 transitions. [2022-03-03 19:14:01,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 11948 states and 53768 transitions. [2022-03-03 19:14:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:14:01,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:01,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:01,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:01,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:01,416 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:01,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1728772687, now seen corresponding path program 4 times [2022-03-03 19:14:01,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:01,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157545269] [2022-03-03 19:14:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:01,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:01,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157545269] [2022-03-03 19:14:01,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157545269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:01,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122183746] [2022-03-03 19:14:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:14:01,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:01,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:01,480 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) [2022-03-03 19:14:01,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:14:01,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:14:01,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:14:01,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:01,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:14:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:01,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:01,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122183746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:01,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:01,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-03 19:14:01,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504154701] [2022-03-03 19:14:01,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:01,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:14:01,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:14:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:14:01,758 INFO L87 Difference]: Start difference. First operand 11948 states and 53768 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:02,881 INFO L93 Difference]: Finished difference Result 76536 states and 352452 transitions. [2022-03-03 19:14:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:14:02,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:14:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:03,005 INFO L225 Difference]: With dead ends: 76536 [2022-03-03 19:14:03,005 INFO L226 Difference]: Without dead ends: 31652 [2022-03-03 19:14:03,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=367, Invalid=823, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:14:03,005 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 669 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:03,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 569 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:14:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31652 states. [2022-03-03 19:14:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31652 to 10999. [2022-03-03 19:14:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10999 states, 10998 states have (on average 4.478268776141117) internal successors, (49252), 10998 states have internal predecessors, (49252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10999 states to 10999 states and 49252 transitions. [2022-03-03 19:14:03,551 INFO L78 Accepts]: Start accepts. Automaton has 10999 states and 49252 transitions. Word has length 39 [2022-03-03 19:14:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:03,551 INFO L470 AbstractCegarLoop]: Abstraction has 10999 states and 49252 transitions. [2022-03-03 19:14:03,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10999 states and 49252 transitions. [2022-03-03 19:14:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:14:03,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:03,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:03,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:03,775 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 [2022-03-03 19:14:03,775 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash -515310098, now seen corresponding path program 5 times [2022-03-03 19:14:03,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:03,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326386885] [2022-03-03 19:14:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:03,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:03,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:03,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326386885] [2022-03-03 19:14:03,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326386885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:03,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015587641] [2022-03-03 19:14:03,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:14:03,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:03,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:03,817 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) [2022-03-03 19:14:03,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:14:03,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:14:03,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:14:03,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:03,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:03,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015587641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:03,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:03,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 19:14:03,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296443817] [2022-03-03 19:14:03,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:03,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:14:03,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:14:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:14:03,958 INFO L87 Difference]: Start difference. First operand 10999 states and 49252 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:04,339 INFO L93 Difference]: Finished difference Result 24323 states and 109383 transitions. [2022-03-03 19:14:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:14:04,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:14:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:04,424 INFO L225 Difference]: With dead ends: 24323 [2022-03-03 19:14:04,424 INFO L226 Difference]: Without dead ends: 24067 [2022-03-03 19:14:04,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:14:04,425 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 206 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:04,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 177 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:14:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24067 states. [2022-03-03 19:14:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24067 to 17699. [2022-03-03 19:14:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17699 states, 17698 states have (on average 4.6157192903152895) internal successors, (81689), 17698 states have internal predecessors, (81689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 81689 transitions. [2022-03-03 19:14:05,008 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 81689 transitions. Word has length 42 [2022-03-03 19:14:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:05,008 INFO L470 AbstractCegarLoop]: Abstraction has 17699 states and 81689 transitions. [2022-03-03 19:14:05,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:05,008 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 81689 transitions. [2022-03-03 19:14:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:14:05,049 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:05,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:05,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:05,251 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 [2022-03-03 19:14:05,251 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash -110682124, now seen corresponding path program 6 times [2022-03-03 19:14:05,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:05,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690731310] [2022-03-03 19:14:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:05,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:05,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690731310] [2022-03-03 19:14:05,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690731310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122848059] [2022-03-03 19:14:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:14:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:05,292 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) [2022-03-03 19:14:05,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:14:05,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:14:05,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:05,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:14:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:05,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:05,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122848059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:05,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:05,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:14:05,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140491511] [2022-03-03 19:14:05,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:05,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:14:05,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:14:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:14:05,494 INFO L87 Difference]: Start difference. First operand 17699 states and 81689 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:06,751 INFO L93 Difference]: Finished difference Result 74693 states and 330550 transitions. [2022-03-03 19:14:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:14:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:14:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:07,116 INFO L225 Difference]: With dead ends: 74693 [2022-03-03 19:14:07,116 INFO L226 Difference]: Without dead ends: 74693 [2022-03-03 19:14:07,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:14:07,117 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1067 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:07,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 384 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:14:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74693 states. [2022-03-03 19:14:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74693 to 33164. [2022-03-03 19:14:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33164 states, 33163 states have (on average 4.697584657600338) internal successors, (155786), 33163 states have internal predecessors, (155786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33164 states to 33164 states and 155786 transitions. [2022-03-03 19:14:08,880 INFO L78 Accepts]: Start accepts. Automaton has 33164 states and 155786 transitions. Word has length 42 [2022-03-03 19:14:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:08,884 INFO L470 AbstractCegarLoop]: Abstraction has 33164 states and 155786 transitions. [2022-03-03 19:14:08,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 33164 states and 155786 transitions. [2022-03-03 19:14:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:14:08,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:08,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:09,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-03 19:14:09,166 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 [2022-03-03 19:14:09,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash -526915678, now seen corresponding path program 7 times [2022-03-03 19:14:09,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:09,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802608659] [2022-03-03 19:14:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:09,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:09,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:09,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802608659] [2022-03-03 19:14:09,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802608659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:09,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280909143] [2022-03-03 19:14:09,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:14:09,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:09,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:09,192 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) [2022-03-03 19:14:09,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:14:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:14:09,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:09,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:09,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280909143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:09,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:09,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:14:09,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949769188] [2022-03-03 19:14:09,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:09,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:14:09,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:14:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:14:09,341 INFO L87 Difference]: Start difference. First operand 33164 states and 155786 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:09,970 INFO L93 Difference]: Finished difference Result 52248 states and 243668 transitions. [2022-03-03 19:14:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:14:09,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:14:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:10,203 INFO L225 Difference]: With dead ends: 52248 [2022-03-03 19:14:10,203 INFO L226 Difference]: Without dead ends: 52183 [2022-03-03 19:14:10,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:14:10,203 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 141 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:10,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 172 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:14:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52183 states. [2022-03-03 19:14:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52183 to 42570. [2022-03-03 19:14:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42570 states, 42569 states have (on average 4.768657943573962) internal successors, (202997), 42569 states have internal predecessors, (202997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42570 states to 42570 states and 202997 transitions. [2022-03-03 19:14:11,820 INFO L78 Accepts]: Start accepts. Automaton has 42570 states and 202997 transitions. Word has length 42 [2022-03-03 19:14:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:11,820 INFO L470 AbstractCegarLoop]: Abstraction has 42570 states and 202997 transitions. [2022-03-03 19:14:11,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 42570 states and 202997 transitions. [2022-03-03 19:14:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:14:11,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:11,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:11,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:12,145 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 [2022-03-03 19:14:12,145 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash -713455420, now seen corresponding path program 8 times [2022-03-03 19:14:12,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:12,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656148924] [2022-03-03 19:14:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:12,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:12,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:12,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656148924] [2022-03-03 19:14:12,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656148924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:12,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340159511] [2022-03-03 19:14:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:14:12,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:12,189 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) [2022-03-03 19:14:12,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:14:12,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:14:12,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:12,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:14:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:12,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:12,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340159511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:12,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:12,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-03 19:14:12,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879363266] [2022-03-03 19:14:12,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:12,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:14:12,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:14:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:14:12,360 INFO L87 Difference]: Start difference. First operand 42570 states and 202997 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:14,385 INFO L93 Difference]: Finished difference Result 107257 states and 509603 transitions. [2022-03-03 19:14:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:14:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:14:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:15,504 INFO L225 Difference]: With dead ends: 107257 [2022-03-03 19:14:15,505 INFO L226 Difference]: Without dead ends: 106805 [2022-03-03 19:14:15,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:14:15,506 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 663 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:15,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 444 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:14:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106805 states. [2022-03-03 19:14:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106805 to 70295. [2022-03-03 19:14:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70295 states, 70294 states have (on average 4.982217543460324) internal successors, (350220), 70294 states have internal predecessors, (350220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70295 states to 70295 states and 350220 transitions. [2022-03-03 19:14:18,709 INFO L78 Accepts]: Start accepts. Automaton has 70295 states and 350220 transitions. Word has length 42 [2022-03-03 19:14:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:18,709 INFO L470 AbstractCegarLoop]: Abstraction has 70295 states and 350220 transitions. [2022-03-03 19:14:18,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 70295 states and 350220 transitions. [2022-03-03 19:14:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:14:18,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:18,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:18,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:19,112 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 [2022-03-03 19:14:19,113 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -399095643, now seen corresponding path program 9 times [2022-03-03 19:14:19,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:19,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726120758] [2022-03-03 19:14:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:19,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:19,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726120758] [2022-03-03 19:14:19,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726120758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:19,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971831759] [2022-03-03 19:14:19,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:14:19,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:19,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:19,161 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) [2022-03-03 19:14:19,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:14:19,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:14:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:14:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:19,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:14:19,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971831759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:19,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:19,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-03-03 19:14:19,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395254860] [2022-03-03 19:14:19,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:19,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:14:19,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:14:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:14:19,634 INFO L87 Difference]: Start difference. First operand 70295 states and 350220 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:21,516 INFO L93 Difference]: Finished difference Result 174263 states and 874545 transitions. [2022-03-03 19:14:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:14:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:14:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:22,837 INFO L225 Difference]: With dead ends: 174263 [2022-03-03 19:14:22,837 INFO L226 Difference]: Without dead ends: 168028 [2022-03-03 19:14:22,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:14:22,839 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 226 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:22,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 179 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:14:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168028 states. [2022-03-03 19:14:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168028 to 143474. [2022-03-03 19:14:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143474 states, 143473 states have (on average 5.12727133328222) internal successors, (735625), 143473 states have internal predecessors, (735625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143474 states to 143474 states and 735625 transitions. [2022-03-03 19:14:29,299 INFO L78 Accepts]: Start accepts. Automaton has 143474 states and 735625 transitions. Word has length 42 [2022-03-03 19:14:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:29,299 INFO L470 AbstractCegarLoop]: Abstraction has 143474 states and 735625 transitions. [2022-03-03 19:14:29,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 143474 states and 735625 transitions. [2022-03-03 19:14:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:14:29,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:29,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:29,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:29,990 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 [2022-03-03 19:14:29,991 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash 62522503, now seen corresponding path program 10 times [2022-03-03 19:14:29,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:29,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615324823] [2022-03-03 19:14:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:29,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:30,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:30,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615324823] [2022-03-03 19:14:30,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615324823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:30,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733986148] [2022-03-03 19:14:30,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:14:30,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:30,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:30,024 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) [2022-03-03 19:14:30,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:14:30,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:14:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:30,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:14:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:30,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:30,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733986148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:30,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:30,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 19:14:30,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213110123] [2022-03-03 19:14:30,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:30,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:14:30,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:14:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:14:30,167 INFO L87 Difference]: Start difference. First operand 143474 states and 735625 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:34,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:34,041 INFO L93 Difference]: Finished difference Result 297547 states and 1523207 transitions. [2022-03-03 19:14:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:14:34,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:14:34,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:36,468 INFO L225 Difference]: With dead ends: 297547 [2022-03-03 19:14:36,468 INFO L226 Difference]: Without dead ends: 296835 [2022-03-03 19:14:36,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:14:36,468 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 290 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:36,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 180 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:14:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296835 states. [2022-03-03 19:14:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296835 to 258515. [2022-03-03 19:14:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258515 states, 258514 states have (on average 5.225949078193057) internal successors, (1350981), 258514 states have internal predecessors, (1350981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258515 states to 258515 states and 1350981 transitions. [2022-03-03 19:14:51,138 INFO L78 Accepts]: Start accepts. Automaton has 258515 states and 1350981 transitions. Word has length 42 [2022-03-03 19:14:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:51,138 INFO L470 AbstractCegarLoop]: Abstraction has 258515 states and 1350981 transitions. [2022-03-03 19:14:51,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 258515 states and 1350981 transitions. [2022-03-03 19:14:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:14:53,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:53,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:14:53,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:53,400 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 [2022-03-03 19:14:53,400 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-03-03 19:14:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1204816665, now seen corresponding path program 11 times [2022-03-03 19:14:53,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:53,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948287216] [2022-03-03 19:14:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:53,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:53,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:53,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948287216] [2022-03-03 19:14:53,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948287216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:53,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508331392] [2022-03-03 19:14:53,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:14:53,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:53,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:53,448 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) [2022-03-03 19:14:53,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:14:53,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:14:53,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:14:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:53,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:53,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508331392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:53,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:53,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:14:53,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492992819] [2022-03-03 19:14:53,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:53,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:14:53,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:14:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:14:53,645 INFO L87 Difference]: Start difference. First operand 258515 states and 1350981 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)