/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:44:56,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:44:56,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:44:56,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:44:56,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:44:56,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:44:56,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:44:56,253 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-Separate.epf [2022-01-18 17:44:56,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:44:56,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:44:56,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:44:56,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:44:56,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:44:56,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:44:56,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:44:56,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:44:56,268 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:44:56,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:44:56,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:44:56,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:44:56,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:44:56,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:44:56,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:44:56,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:44:56,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:44:56,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:44:56,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:44:56,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:44:56,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:44:56,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:44:56,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:44:56,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:44:56,270 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:44:56,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:44:56,271 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:44:56,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:44:56,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:44:56,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:44:56,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:44:56,466 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:44:56,469 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:44:56,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl [2022-01-18 17:44:56,470 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl' [2022-01-18 17:44:56,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:44:56,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:44:56,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:44:56,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:44:56,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:44:56,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,508 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:44:56,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:44:56,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:44:56,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:44:56,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:44:56,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:44:56,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:44:56,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:44:56,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:44:56,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/1) ... [2022-01-18 17:44:56,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:44:56,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:56,547 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) [2022-01-18 17:44:56,566 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 [2022-01-18 17:44:56,574 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:44:56,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:44:56,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:44:56,574 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:44:56,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:44:56,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:44:56,574 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:44:56,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:44:56,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:44:56,575 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 17:44:56,605 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:44:56,606 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:44:56,672 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:44:56,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:44:56,682 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 17:44:56,682 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 17:44:56,682 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 17:44:56,683 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:44:56 BoogieIcfgContainer [2022-01-18 17:44:56,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:44:56,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:44:56,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:44:56,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:44:56,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:56" (1/2) ... [2022-01-18 17:44:56,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2140603a and model type context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:44:56, skipping insertion in model container [2022-01-18 17:44:56,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:44:56" (2/2) ... [2022-01-18 17:44:56,691 INFO L111 eAbstractionObserver]: Analyzing ICFG context1.wvr.bpl [2022-01-18 17:44:56,698 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:44:56,698 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:44:56,698 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:44:56,698 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:44:56,733 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 17:44:56,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:44:56,789 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, 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 [2022-01-18 17:44:56,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 17:44:56,794 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-01-18 17:44:56,811 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-18 17:44:56,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:56,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:56,817 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:44:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash -778541899, now seen corresponding path program 1 times [2022-01-18 17:44:56,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:56,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92238] [2022-01-18 17:44:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:56,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:56,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:56,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92238] [2022-01-18 17:44:56,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:56,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:56,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 17:44:56,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403147374] [2022-01-18 17:44:56,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:56,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:44:56,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:44:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:44:56,967 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:56,990 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2022-01-18 17:44:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:44:56,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-18 17:44:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:56,997 INFO L225 Difference]: With dead ends: 20 [2022-01-18 17:44:56,997 INFO L226 Difference]: Without dead ends: 16 [2022-01-18 17:44:56,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:44:57,002 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:57,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-18 17:44:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-18 17:44:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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) [2022-01-18 17:44:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2022-01-18 17:44:57,023 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2022-01-18 17:44:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:57,024 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2022-01-18 17:44:57,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2022-01-18 17:44:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 17:44:57,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:57,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:57,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:44:57,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:44:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1635730770, now seen corresponding path program 1 times [2022-01-18 17:44:57,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:57,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793715833] [2022-01-18 17:44:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:57,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:57,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793715833] [2022-01-18 17:44:57,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793715833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:57,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:57,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 17:44:57,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445030910] [2022-01-18 17:44:57,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:57,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:44:57,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:57,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:44:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:44:57,081 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:57,099 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2022-01-18 17:44:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:44:57,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 17:44:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:57,100 INFO L225 Difference]: With dead ends: 21 [2022-01-18 17:44:57,100 INFO L226 Difference]: Without dead ends: 18 [2022-01-18 17:44:57,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:44:57,101 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:57,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-18 17:44:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-18 17:44:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-01-18 17:44:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2022-01-18 17:44:57,108 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2022-01-18 17:44:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:57,109 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2022-01-18 17:44:57,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2022-01-18 17:44:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 17:44:57,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:57,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:57,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 17:44:57,110 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:44:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash -987197357, now seen corresponding path program 1 times [2022-01-18 17:44:57,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:57,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331800717] [2022-01-18 17:44:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:57,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:57,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331800717] [2022-01-18 17:44:57,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331800717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:57,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258403614] [2022-01-18 17:44:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:57,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:57,155 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) [2022-01-18 17:44:57,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 17:44:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:57,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:44:57,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:57,270 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 [2022-01-18 17:44:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:57,346 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 17:44:57,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2022-01-18 17:44:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258403614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:57,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:57,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 17:44:57,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47038228] [2022-01-18 17:44:57,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:57,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:57,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:57,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:57,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:57,356 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:57,394 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2022-01-18 17:44:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:44:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 17:44:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:57,398 INFO L225 Difference]: With dead ends: 25 [2022-01-18 17:44:57,398 INFO L226 Difference]: Without dead ends: 21 [2022-01-18 17:44:57,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:44:57,403 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:57,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-18 17:44:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-18 17:44:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2022-01-18 17:44:57,411 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2022-01-18 17:44:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:57,412 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2022-01-18 17:44:57,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2022-01-18 17:44:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 17:44:57,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:57,412 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:57,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:57,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:57,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:44:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash -537621132, now seen corresponding path program 2 times [2022-01-18 17:44:57,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:57,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847584168] [2022-01-18 17:44:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:57,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:57,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847584168] [2022-01-18 17:44:57,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847584168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:57,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514982383] [2022-01-18 17:44:57,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:57,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:57,660 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) [2022-01-18 17:44:57,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 17:44:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 17:44:57,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514982383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:57,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:57,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-18 17:44:57,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030925520] [2022-01-18 17:44:57,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:57,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:44:57,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:44:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:44:57,724 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:57,752 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2022-01-18 17:44:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:44:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 17:44:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:57,754 INFO L225 Difference]: With dead ends: 50 [2022-01-18 17:44:57,754 INFO L226 Difference]: Without dead ends: 45 [2022-01-18 17:44:57,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:44:57,756 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:57,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-18 17:44:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-01-18 17:44:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2022-01-18 17:44:57,766 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2022-01-18 17:44:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:57,767 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2022-01-18 17:44:57,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2022-01-18 17:44:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 17:44:57,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:57,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:57,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 17:44:57,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 17:44:57,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:44:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash -25748427, now seen corresponding path program 3 times [2022-01-18 17:44:57,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:57,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066573858] [2022-01-18 17:44:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:57,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:58,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066573858] [2022-01-18 17:44:58,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066573858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:58,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918400704] [2022-01-18 17:44:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:58,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:58,018 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) [2022-01-18 17:44:58,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 17:44:58,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:44:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:58,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 17:44:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:58,083 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 [2022-01-18 17:44:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:58,129 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:44:58,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:44:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918400704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:58,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:58,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-01-18 17:44:58,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497321030] [2022-01-18 17:44:58,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:58,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:44:58,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:44:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:44:58,145 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:58,213 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2022-01-18 17:44:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 17:44:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:58,214 INFO L225 Difference]: With dead ends: 65 [2022-01-18 17:44:58,214 INFO L226 Difference]: Without dead ends: 39 [2022-01-18 17:44:58,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:44:58,215 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:58,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-18 17:44:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2022-01-18 17:44:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2022-01-18 17:44:58,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2022-01-18 17:44:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:58,234 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2022-01-18 17:44:58,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2022-01-18 17:44:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 17:44:58,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:58,234 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:58,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:58,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:58,435 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:44:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -797475374, now seen corresponding path program 4 times [2022-01-18 17:44:58,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830556993] [2022-01-18 17:44:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:58,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830556993] [2022-01-18 17:44:58,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830556993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309364816] [2022-01-18 17:44:58,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:58,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:58,481 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) [2022-01-18 17:44:58,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 17:44:58,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:58,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:58,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309364816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:58,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:58,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 17:44:58,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23624734] [2022-01-18 17:44:58,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:58,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:58,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:58,572 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:58,596 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2022-01-18 17:44:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:44:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 17:44:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:58,596 INFO L225 Difference]: With dead ends: 73 [2022-01-18 17:44:58,597 INFO L226 Difference]: Without dead ends: 66 [2022-01-18 17:44:58,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:58,597 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:58,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-18 17:44:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2022-01-18 17:44:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2022-01-18 17:44:58,601 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2022-01-18 17:44:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:58,602 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2022-01-18 17:44:58,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2022-01-18 17:44:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 17:44:58,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:58,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:58,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:58,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:58,818 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:44:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1485922387, now seen corresponding path program 5 times [2022-01-18 17:44:58,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:58,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107703185] [2022-01-18 17:44:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:58,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:58,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:58,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107703185] [2022-01-18 17:44:58,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107703185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:58,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580479710] [2022-01-18 17:44:58,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:44:58,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:58,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:58,886 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) [2022-01-18 17:44:58,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 17:44:58,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:44:58,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:44:58,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:03,120 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-01-18 17:45:03,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 17:45:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:03,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:03,234 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:03,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:03,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580479710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:03,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:03,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:45:03,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304400935] [2022-01-18 17:45:03,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:03,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:45:03,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:03,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:45:03,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=237, Unknown=2, NotChecked=0, Total=306 [2022-01-18 17:45:03,274 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:11,633 INFO L93 Difference]: Finished difference Result 152 states and 302 transitions. [2022-01-18 17:45:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:45:11,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 17:45:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:11,634 INFO L225 Difference]: With dead ends: 152 [2022-01-18 17:45:11,634 INFO L226 Difference]: Without dead ends: 145 [2022-01-18 17:45:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=205, Invalid=659, Unknown=6, NotChecked=0, Total=870 [2022-01-18 17:45:11,635 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 150 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 66 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-01-18 17:45:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-18 17:45:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 83. [2022-01-18 17:45:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.3292682926829267) internal successors, (191), 82 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 191 transitions. [2022-01-18 17:45:11,643 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 191 transitions. Word has length 15 [2022-01-18 17:45:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:11,643 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 191 transitions. [2022-01-18 17:45:11,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 191 transitions. [2022-01-18 17:45:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 17:45:11,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:11,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:11,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:11,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:11,844 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1504356413, now seen corresponding path program 6 times [2022-01-18 17:45:11,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931813870] [2022-01-18 17:45:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:11,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:11,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931813870] [2022-01-18 17:45:11,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931813870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:11,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143272404] [2022-01-18 17:45:11,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:45:11,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:11,907 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) [2022-01-18 17:45:11,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 17:45:11,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:45:11,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:11,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:45:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:11,983 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 [2022-01-18 17:45:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:12,021 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:12,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143272404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:12,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:12,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 17:45:12,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230501374] [2022-01-18 17:45:12,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:12,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:45:12,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:12,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:45:12,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:45:12,041 INFO L87 Difference]: Start difference. First operand 83 states and 191 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:12,154 INFO L93 Difference]: Finished difference Result 170 states and 360 transitions. [2022-01-18 17:45:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 17:45:12,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 17:45:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:12,155 INFO L225 Difference]: With dead ends: 170 [2022-01-18 17:45:12,155 INFO L226 Difference]: Without dead ends: 118 [2022-01-18 17:45:12,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:45:12,156 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:12,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 80 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:45:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-18 17:45:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2022-01-18 17:45:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 143 transitions. [2022-01-18 17:45:12,161 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 143 transitions. Word has length 15 [2022-01-18 17:45:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:12,161 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 143 transitions. [2022-01-18 17:45:12,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 143 transitions. [2022-01-18 17:45:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 17:45:12,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:12,162 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:12,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 17:45:12,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:12,375 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash -590431564, now seen corresponding path program 7 times [2022-01-18 17:45:12,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:12,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524544330] [2022-01-18 17:45:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:12,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524544330] [2022-01-18 17:45:12,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524544330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953849776] [2022-01-18 17:45:12,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:45:12,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:12,414 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) [2022-01-18 17:45:12,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 17:45:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:45:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953849776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:12,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:12,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-01-18 17:45:12,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498814458] [2022-01-18 17:45:12,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:12,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 17:45:12,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:12,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 17:45:12,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:45:12,515 INFO L87 Difference]: Start difference. First operand 69 states and 143 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:12,538 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2022-01-18 17:45:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 17:45:12,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 17:45:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:12,539 INFO L225 Difference]: With dead ends: 144 [2022-01-18 17:45:12,539 INFO L226 Difference]: Without dead ends: 136 [2022-01-18 17:45:12,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:45:12,540 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:12,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 28 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:45:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-18 17:45:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 75. [2022-01-18 17:45:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 74 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 167 transitions. [2022-01-18 17:45:12,544 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 167 transitions. Word has length 16 [2022-01-18 17:45:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:12,545 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 167 transitions. [2022-01-18 17:45:12,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 167 transitions. [2022-01-18 17:45:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 17:45:12,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:12,545 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:12,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:12,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:12,759 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1563360331, now seen corresponding path program 8 times [2022-01-18 17:45:12,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:12,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377991481] [2022-01-18 17:45:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:12,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377991481] [2022-01-18 17:45:12,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377991481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220895908] [2022-01-18 17:45:12,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:12,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:12,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:12,856 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) [2022-01-18 17:45:12,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 17:45:12,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:12,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 17:45:12,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:12,932 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 [2022-01-18 17:45:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:12,979 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:12,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220895908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:13,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:13,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-01-18 17:45:13,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552303546] [2022-01-18 17:45:13,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:13,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:45:13,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:13,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:45:13,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:45:13,001 INFO L87 Difference]: Start difference. First operand 75 states and 167 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:13,168 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2022-01-18 17:45:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:45:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 17:45:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:13,169 INFO L225 Difference]: With dead ends: 150 [2022-01-18 17:45:13,169 INFO L226 Difference]: Without dead ends: 88 [2022-01-18 17:45:13,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:45:13,169 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:13,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 122 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:45:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-18 17:45:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 36. [2022-01-18 17:45:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2022-01-18 17:45:13,172 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2022-01-18 17:45:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:13,172 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2022-01-18 17:45:13,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2022-01-18 17:45:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 17:45:13,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:13,172 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:13,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:13,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 17:45:13,388 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:13,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1218804142, now seen corresponding path program 9 times [2022-01-18 17:45:13,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:13,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300508329] [2022-01-18 17:45:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:13,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300508329] [2022-01-18 17:45:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300508329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521086664] [2022-01-18 17:45:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:45:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:13,430 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) [2022-01-18 17:45:13,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 17:45:13,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:45:13,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 17:45:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521086664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:13,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:13,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-01-18 17:45:13,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713206686] [2022-01-18 17:45:13,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:13,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:45:13,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:45:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:45:13,509 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:13,536 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2022-01-18 17:45:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:45:13,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 17:45:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:13,537 INFO L225 Difference]: With dead ends: 128 [2022-01-18 17:45:13,537 INFO L226 Difference]: Without dead ends: 117 [2022-01-18 17:45:13,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:45:13,538 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:13,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 39 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:45:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-18 17:45:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2022-01-18 17:45:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2022-01-18 17:45:13,541 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2022-01-18 17:45:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:13,541 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2022-01-18 17:45:13,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2022-01-18 17:45:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 17:45:13,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:13,542 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:13,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-18 17:45:13,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:13,751 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 47005779, now seen corresponding path program 10 times [2022-01-18 17:45:13,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:13,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966386522] [2022-01-18 17:45:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:13,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:13,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966386522] [2022-01-18 17:45:13,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966386522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:13,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399368323] [2022-01-18 17:45:13,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:45:13,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:13,853 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) [2022-01-18 17:45:13,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 17:45:13,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:45:13,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:45:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:13,940 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 [2022-01-18 17:45:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:13,972 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:13,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399368323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:13,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:13,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-01-18 17:45:13,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820573320] [2022-01-18 17:45:13,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:13,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:45:13,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:45:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:45:13,999 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:14,237 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2022-01-18 17:45:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 17:45:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 17:45:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:14,238 INFO L225 Difference]: With dead ends: 179 [2022-01-18 17:45:14,238 INFO L226 Difference]: Without dead ends: 105 [2022-01-18 17:45:14,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:14,239 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:14,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 173 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:45:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-18 17:45:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2022-01-18 17:45:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-01-18 17:45:14,241 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2022-01-18 17:45:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:14,241 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-01-18 17:45:14,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-01-18 17:45:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:45:14,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:14,241 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:14,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:14,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 17:45:14,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1457905012, now seen corresponding path program 11 times [2022-01-18 17:45:14,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:14,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316145222] [2022-01-18 17:45:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:14,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:14,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:14,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316145222] [2022-01-18 17:45:14,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316145222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:14,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948202810] [2022-01-18 17:45:14,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:45:14,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:14,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:14,509 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) [2022-01-18 17:45:14,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 17:45:14,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:45:14,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:14,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:45:14,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:14,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:14,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948202810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:14,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:14,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-01-18 17:45:14,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004987201] [2022-01-18 17:45:14,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:14,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:45:14,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:45:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:45:14,613 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:14,648 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2022-01-18 17:45:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 17:45:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 17:45:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:14,649 INFO L225 Difference]: With dead ends: 160 [2022-01-18 17:45:14,649 INFO L226 Difference]: Without dead ends: 147 [2022-01-18 17:45:14,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:45:14,650 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:14,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 48 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:45:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-18 17:45:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2022-01-18 17:45:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2022-01-18 17:45:14,653 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2022-01-18 17:45:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:14,653 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2022-01-18 17:45:14,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2022-01-18 17:45:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:45:14,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:14,654 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:14,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:14,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 17:45:14,860 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1869472971, now seen corresponding path program 12 times [2022-01-18 17:45:14,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:14,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008047194] [2022-01-18 17:45:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:14,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:14,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008047194] [2022-01-18 17:45:14,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008047194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541183210] [2022-01-18 17:45:14,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:45:14,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:14,988 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) [2022-01-18 17:45:14,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 17:45:15,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:45:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:15,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:15,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:15,078 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 [2022-01-18 17:45:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:15,112 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:15,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541183210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:15,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:15,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-01-18 17:45:15,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670194377] [2022-01-18 17:45:15,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:15,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:45:15,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:45:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:45:15,141 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:15,427 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2022-01-18 17:45:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 17:45:15,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:45:15,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:15,428 INFO L225 Difference]: With dead ends: 229 [2022-01-18 17:45:15,428 INFO L226 Difference]: Without dead ends: 135 [2022-01-18 17:45:15,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:45:15,428 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 152 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:15,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 233 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:45:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-18 17:45:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2022-01-18 17:45:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2022-01-18 17:45:15,430 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2022-01-18 17:45:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:15,431 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2022-01-18 17:45:15,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2022-01-18 17:45:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:45:15,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:15,431 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:15,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:15,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 17:45:15,646 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2118361390, now seen corresponding path program 13 times [2022-01-18 17:45:15,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501995013] [2022-01-18 17:45:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:15,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:15,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501995013] [2022-01-18 17:45:15,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501995013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074987670] [2022-01-18 17:45:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:45:15,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:15,703 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) [2022-01-18 17:45:15,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 17:45:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 17:45:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074987670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:15,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:15,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 17:45:15,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750672303] [2022-01-18 17:45:15,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:15,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:45:15,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:15,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:45:15,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:45:15,804 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:15,842 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2022-01-18 17:45:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 17:45:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:45:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:15,843 INFO L225 Difference]: With dead ends: 195 [2022-01-18 17:45:15,843 INFO L226 Difference]: Without dead ends: 180 [2022-01-18 17:45:15,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:45:15,843 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 79 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:15,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 53 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:45:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-18 17:45:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2022-01-18 17:45:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2022-01-18 17:45:15,847 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2022-01-18 17:45:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2022-01-18 17:45:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2022-01-18 17:45:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:45:15,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:15,848 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:15,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:16,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 17:45:16,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash 22032467, now seen corresponding path program 14 times [2022-01-18 17:45:16,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:16,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905846461] [2022-01-18 17:45:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:16,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:16,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:16,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905846461] [2022-01-18 17:45:16,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905846461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:16,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581521159] [2022-01-18 17:45:16,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:16,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:16,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:16,222 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) [2022-01-18 17:45:16,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 17:45:16,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:16,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:16,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 17:45:16,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:16,336 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 [2022-01-18 17:45:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:16,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:16,373 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:16,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:16,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581521159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:16,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:16,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-01-18 17:45:16,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749787867] [2022-01-18 17:45:16,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:16,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:45:16,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:45:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:45:16,406 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:16,796 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2022-01-18 17:45:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:45:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:45:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:16,797 INFO L225 Difference]: With dead ends: 285 [2022-01-18 17:45:16,797 INFO L226 Difference]: Without dead ends: 169 [2022-01-18 17:45:16,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:45:16,798 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 191 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:16,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 302 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:45:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-18 17:45:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2022-01-18 17:45:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2022-01-18 17:45:16,800 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2022-01-18 17:45:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:16,800 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2022-01-18 17:45:16,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2022-01-18 17:45:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:45:16,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:16,801 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:16,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:17,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:17,008 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash 683732340, now seen corresponding path program 15 times [2022-01-18 17:45:17,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:17,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625156240] [2022-01-18 17:45:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:17,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:17,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625156240] [2022-01-18 17:45:17,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625156240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:17,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165826556] [2022-01-18 17:45:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:45:17,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:17,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:17,076 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) [2022-01-18 17:45:17,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 17:45:17,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 17:45:17,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:45:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:17,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:17,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165826556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:17,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:17,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-18 17:45:17,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413853955] [2022-01-18 17:45:17,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:17,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:45:17,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:45:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:45:17,245 INFO L87 Difference]: Start difference. First operand 51 states and 96 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:17,282 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2022-01-18 17:45:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:45:17,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:45:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:17,283 INFO L225 Difference]: With dead ends: 233 [2022-01-18 17:45:17,283 INFO L226 Difference]: Without dead ends: 216 [2022-01-18 17:45:17,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:45:17,284 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 106 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:17,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 56 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:45:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-18 17:45:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2022-01-18 17:45:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.095808383233533) internal successors, (350), 167 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2022-01-18 17:45:17,287 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2022-01-18 17:45:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:17,287 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2022-01-18 17:45:17,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2022-01-18 17:45:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:45:17,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:17,288 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:17,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 17:45:17,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 17:45:17,503 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash 312894133, now seen corresponding path program 16 times [2022-01-18 17:45:17,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:17,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857241952] [2022-01-18 17:45:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:17,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:17,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857241952] [2022-01-18 17:45:17,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857241952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773503600] [2022-01-18 17:45:17,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:45:17,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:17,673 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:17,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 17:45:17,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:45:17,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 17:45:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:17,780 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 [2022-01-18 17:45:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:17,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:17,820 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:17,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:17,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773503600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:17,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:17,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-01-18 17:45:17,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583985539] [2022-01-18 17:45:17,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:45:17,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:17,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:45:17,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:45:17,856 INFO L87 Difference]: Start difference. First operand 168 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:18,358 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2022-01-18 17:45:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 17:45:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:45:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:18,359 INFO L225 Difference]: With dead ends: 347 [2022-01-18 17:45:18,359 INFO L226 Difference]: Without dead ends: 207 [2022-01-18 17:45:18,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:45:18,360 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 234 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:18,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 380 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:45:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-18 17:45:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2022-01-18 17:45:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2022-01-18 17:45:18,362 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2022-01-18 17:45:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:18,362 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2022-01-18 17:45:18,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2022-01-18 17:45:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:18,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:18,363 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:18,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:18,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 17:45:18,574 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1110509394, now seen corresponding path program 17 times [2022-01-18 17:45:18,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:18,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018335772] [2022-01-18 17:45:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:18,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:18,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:18,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018335772] [2022-01-18 17:45:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018335772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:18,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743791023] [2022-01-18 17:45:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:45:18,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:18,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:18,659 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:18,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 17:45:18,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 17:45:18,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:45:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:18,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:18,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743791023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:18,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:18,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-01-18 17:45:18,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580700921] [2022-01-18 17:45:18,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:18,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:45:18,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:45:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:45:18,789 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:18,830 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2022-01-18 17:45:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:45:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:18,831 INFO L225 Difference]: With dead ends: 274 [2022-01-18 17:45:18,831 INFO L226 Difference]: Without dead ends: 255 [2022-01-18 17:45:18,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:45:18,832 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:18,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 62 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:45:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-18 17:45:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2022-01-18 17:45:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2022-01-18 17:45:18,835 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2022-01-18 17:45:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:18,836 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2022-01-18 17:45:18,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2022-01-18 17:45:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 17:45:18,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:18,836 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:18,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:19,048 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:45:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1217278035, now seen corresponding path program 18 times [2022-01-18 17:45:19,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233597635] [2022-01-18 17:45:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:19,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:19,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:19,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233597635] [2022-01-18 17:45:19,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233597635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:19,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72511838] [2022-01-18 17:45:19,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:45:19,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:19,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:19,264 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:45:19,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 17:45:19,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 17:45:19,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:19,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 17:45:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:52,160 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-01-18 17:45:52,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 17:45:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 54 refuted. 30 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:52,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:52,465 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 17:45:52,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-01-18 17:45:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:52,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72511838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:52,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:52,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2022-01-18 17:45:52,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828592654] [2022-01-18 17:45:52,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:52,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 17:45:52,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:52,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 17:45:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1865, Unknown=31, NotChecked=0, Total=2256 [2022-01-18 17:45:52,502 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 48 states, 48 states have (on average 1.3125) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:07,694 WARN L228 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 46 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:50:20,834 WARN L228 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:53:18,516 WARN L228 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 54 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:53:53,772 WARN L228 SmtUtils]: Spent 10.95s on a formula simplification. DAG size of input: 51 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:54:25,085 WARN L228 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 52 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:57:36,859 WARN L228 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:58:01,380 WARN L228 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:58:25,615 WARN L228 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-01-18 17:59:44,954 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:59:44,979 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:59:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 17:59:45,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 48 SyntacticMatches, 31 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 849.4s TimeCoverageRelationStatistics Valid=3135, Invalid=11289, Unknown=338, NotChecked=0, Total=14762 [2022-01-18 17:59:45,582 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 290 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:59:45,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 539 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 393 Invalid, 0 Unknown, 735 Unchecked, 0.2s Time] [2022-01-18 17:59:45,582 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 17:59:45,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 17:59:45,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:59:45,783 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (201states) and FLOYD_HOARE automaton (currently 87 states, 48 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 122 known predicates. [2022-01-18 17:59:45,784 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 17:59:45,784 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 17:59:45,786 INFO L732 BasicCegarLoop]: Path program histogram: [18, 1, 1] [2022-01-18 17:59:45,788 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:59:45,788 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:59:45,789 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:59:45 BasicIcfg [2022-01-18 17:59:45,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:59:45,790 INFO L158 Benchmark]: Toolchain (without parser) took 889299.03ms. Allocated memory is still 348.1MB. Free memory was 310.3MB in the beginning and 185.1MB in the end (delta: 125.2MB). Peak memory consumption was 126.5MB. Max. memory is 16.0GB. [2022-01-18 17:59:45,790 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 348.1MB. Free memory is still 311.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:59:45,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.01ms. Allocated memory is still 348.1MB. Free memory was 310.2MB in the beginning and 308.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 17:59:45,790 INFO L158 Benchmark]: Boogie Preprocessor took 11.56ms. Allocated memory is still 348.1MB. Free memory was 308.6MB in the beginning and 307.7MB in the end (delta: 954.5kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:59:45,790 INFO L158 Benchmark]: RCFGBuilder took 160.63ms. Allocated memory is still 348.1MB. Free memory was 307.7MB in the beginning and 298.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 17:59:45,790 INFO L158 Benchmark]: TraceAbstraction took 889104.99ms. Allocated memory is still 348.1MB. Free memory was 298.2MB in the beginning and 185.1MB in the end (delta: 113.1MB). Peak memory consumption was 113.9MB. Max. memory is 16.0GB. [2022-01-18 17:59:45,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 348.1MB. Free memory is still 311.4MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.01ms. Allocated memory is still 348.1MB. Free memory was 310.2MB in the beginning and 308.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 11.56ms. Allocated memory is still 348.1MB. Free memory was 308.6MB in the beginning and 307.7MB in the end (delta: 954.5kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 160.63ms. Allocated memory is still 348.1MB. Free memory was 307.7MB in the beginning and 298.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 889104.99ms. Allocated memory is still 348.1MB. Free memory was 298.2MB in the beginning and 185.1MB in the end (delta: 113.1MB). Peak memory consumption was 113.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (201states) and FLOYD_HOARE automaton (currently 87 states, 48 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 122 known predicates. - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (201states) and FLOYD_HOARE automaton (currently 87 states, 48 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 122 known predicates. - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (201states) and FLOYD_HOARE automaton (currently 87 states, 48 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 122 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 889.0s, OverallIterations: 20, TraceHistogramMax: 9, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 843.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1773 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1773 mSDsluCounter, 2386 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 844 IncrementalHoareTripleChecker+Unchecked, 3868 mSDsCounter, 364 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3168 IncrementalHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 364 mSolverCounterUnsat, 302 mSDtfsCounter, 3168 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1070 GetRequests, 652 SyntacticMatches, 71 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 863.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=19, InterpolantAutomatonStates: 183, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 899 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 40.6s InterpolantComputationTime, 695 NumberOfCodeBlocks, 695 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 977 ConstructedInterpolants, 18 QuantifiedInterpolants, 4371 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1376 ConjunctsInSsa, 312 ConjunctsInUnsatCore, 56 InterpolantComputations, 2 PerfectInterpolantSequences, 500/1879 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown