/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/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:47:11,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:47:11,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:47:11,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 16:47:11,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:47:11,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:47:11,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:47:11,556 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 16:47:11,568 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:47:11,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:47:11,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:47:11,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:47:11,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:47:11,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:47:11,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:47:11,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:47:11,569 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:47:11,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:47:11,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:47:11,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:47:11,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:47:11,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:47:11,572 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:47:11,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:47:11,572 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:47:11,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:47:11,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:47:11,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:47:11,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:47:11,762 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:47:11,763 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:47:11,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2022-01-18 16:47:11,764 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2022-01-18 16:47:11,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:47:11,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:47:11,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:47:11,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:47:11,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:47:11,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,824 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:47:11,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:47:11,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:47:11,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:47:11,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:47:11,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:47:11,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:47:11,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:47:11,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:47:11,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/1) ... [2022-01-18 16:47:11,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:47:11,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:11,871 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 16:47:11,895 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 16:47:11,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:47:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:47:11,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:47:11,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:47:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:47:11,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:47:11,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:47:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:47:11,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:47:11,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 16:47:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 16:47:11,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 16:47:11,905 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 16:47:11,941 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:47:11,942 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:47:12,034 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:47:12,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:47:12,050 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:47:12,052 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:47:12 BoogieIcfgContainer [2022-01-18 16:47:12,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:47:12,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:47:12,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:47:12,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:47:12,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:47:11" (1/2) ... [2022-01-18 16:47:12,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bbcef03 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:47:12, skipping insertion in model container [2022-01-18 16:47:12,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:47:12" (2/2) ... [2022-01-18 16:47:12,075 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2022-01-18 16:47:12,078 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:47:12,078 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:47:12,078 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:47:12,078 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:47:12,121 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 16:47:12,165 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:47:12,169 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 16:47:12,170 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 16:47:12,177 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2022-01-18 16:47:12,247 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 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 16:47:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 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 16:47:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:47:12,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:12,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:12,265 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1250089448, now seen corresponding path program 1 times [2022-01-18 16:47:12,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:12,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892855200] [2022-01-18 16:47:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:12,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:12,354 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 16:47:12,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892855200] [2022-01-18 16:47:12,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892855200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:12,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:12,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:47:12,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986256348] [2022-01-18 16:47:12,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:12,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:47:12,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:47:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:47:12,393 INFO L87 Difference]: Start difference. First operand has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 16:47:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:12,464 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2022-01-18 16:47:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:47:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 16:47:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:12,483 INFO L225 Difference]: With dead ends: 1114 [2022-01-18 16:47:12,483 INFO L226 Difference]: Without dead ends: 1114 [2022-01-18 16:47:12,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 16:47:12,487 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:12,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-01-18 16:47:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2022-01-18 16:47:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.976639712488769) internal successors, (3313), 1113 states have internal predecessors, (3313), 0 states have call successors, (0), 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 16:47:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2022-01-18 16:47:12,617 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2022-01-18 16:47:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:12,617 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2022-01-18 16:47:12,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 16:47:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2022-01-18 16:47:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:47:12,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:12,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:12,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:47:12,621 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:12,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1768543911, now seen corresponding path program 1 times [2022-01-18 16:47:12,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359004340] [2022-01-18 16:47:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:12,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:12,664 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 16:47:12,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:12,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359004340] [2022-01-18 16:47:12,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359004340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:12,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:12,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:47:12,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770880205] [2022-01-18 16:47:12,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:12,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:47:12,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:47:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:47:12,667 INFO L87 Difference]: Start difference. First operand 1114 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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 16:47:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:12,704 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2022-01-18 16:47:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:47:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:47:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:12,710 INFO L225 Difference]: With dead ends: 1117 [2022-01-18 16:47:12,710 INFO L226 Difference]: Without dead ends: 1117 [2022-01-18 16:47:12,711 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 16:47:12,718 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:12,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-18 16:47:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2022-01-18 16:47:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9659498207885306) internal successors, (3310), 1116 states have internal predecessors, (3310), 0 states have call successors, (0), 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 16:47:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2022-01-18 16:47:12,749 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2022-01-18 16:47:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:12,750 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2022-01-18 16:47:12,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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 16:47:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2022-01-18 16:47:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:47:12,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:12,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:12,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:47:12,754 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1697787189, now seen corresponding path program 2 times [2022-01-18 16:47:12,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:12,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840228406] [2022-01-18 16:47:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:12,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:12,807 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 16:47:12,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:12,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840228406] [2022-01-18 16:47:12,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840228406] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:12,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:12,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:47:12,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561674955] [2022-01-18 16:47:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:12,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:47:12,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:12,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:47:12,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:47:12,809 INFO L87 Difference]: Start difference. First operand 1117 states and 3310 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:12,856 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2022-01-18 16:47:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:47:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:47:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:12,862 INFO L225 Difference]: With dead ends: 1228 [2022-01-18 16:47:12,862 INFO L226 Difference]: Without dead ends: 1228 [2022-01-18 16:47:12,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 16:47:12,867 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:12,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-01-18 16:47:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2022-01-18 16:47:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.967400162999185) internal successors, (3641), 1227 states have internal predecessors, (3641), 0 states have call successors, (0), 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 16:47:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2022-01-18 16:47:12,898 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2022-01-18 16:47:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:12,898 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2022-01-18 16:47:12,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2022-01-18 16:47:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 16:47:12,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:12,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:12,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:47:12,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -370597703, now seen corresponding path program 1 times [2022-01-18 16:47:12,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573653377] [2022-01-18 16:47:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:12,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:47:12,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:12,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573653377] [2022-01-18 16:47:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573653377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:12,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:12,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:47:12,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814763701] [2022-01-18 16:47:12,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:12,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:47:12,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:47:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:47:12,976 INFO L87 Difference]: Start difference. First operand 1228 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:13,017 INFO L93 Difference]: Finished difference Result 1783 states and 5179 transitions. [2022-01-18 16:47:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:47:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 16:47:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:13,023 INFO L225 Difference]: With dead ends: 1783 [2022-01-18 16:47:13,024 INFO L226 Difference]: Without dead ends: 1405 [2022-01-18 16:47:13,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 16:47:13,025 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:13,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-01-18 16:47:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2022-01-18 16:47:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.9382402707275803) internal successors, (3473), 1182 states have internal predecessors, (3473), 0 states have call successors, (0), 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 16:47:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3473 transitions. [2022-01-18 16:47:13,051 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3473 transitions. Word has length 32 [2022-01-18 16:47:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:13,051 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 3473 transitions. [2022-01-18 16:47:13,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3473 transitions. [2022-01-18 16:47:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:47:13,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:13,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:13,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 16:47:13,056 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1433478102, now seen corresponding path program 1 times [2022-01-18 16:47:13,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:13,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189329182] [2022-01-18 16:47:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:13,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:47:13,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189329182] [2022-01-18 16:47:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189329182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:13,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:47:13,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:47:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732379618] [2022-01-18 16:47:13,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:47:13,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:47:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:47:13,090 INFO L87 Difference]: Start difference. First operand 1183 states and 3473 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:13,115 INFO L93 Difference]: Finished difference Result 915 states and 2610 transitions. [2022-01-18 16:47:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:47:13,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:47:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:13,118 INFO L225 Difference]: With dead ends: 915 [2022-01-18 16:47:13,119 INFO L226 Difference]: Without dead ends: 915 [2022-01-18 16:47:13,119 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 16:47:13,119 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:13,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-01-18 16:47:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2022-01-18 16:47:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.8555798687089715) internal successors, (2610), 914 states have internal predecessors, (2610), 0 states have call successors, (0), 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 16:47:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2610 transitions. [2022-01-18 16:47:13,135 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2610 transitions. Word has length 37 [2022-01-18 16:47:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:13,136 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2610 transitions. [2022-01-18 16:47:13,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2610 transitions. [2022-01-18 16:47:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:47:13,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:13,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:13,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 16:47:13,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2073694574, now seen corresponding path program 2 times [2022-01-18 16:47:13,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:13,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840716215] [2022-01-18 16:47:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:13,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:13,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:13,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840716215] [2022-01-18 16:47:13,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840716215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:13,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31124143] [2022-01-18 16:47:13,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:47:13,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:13,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:13,280 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 16:47:13,281 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 16:47:13,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:47:13,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:13,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:47:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:13,422 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 16:47:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:47:13,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:13,586 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:47:13,587 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 11 treesize of output 10 [2022-01-18 16:47:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:47:13,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31124143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:13,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:13,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-01-18 16:47:13,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230677125] [2022-01-18 16:47:13,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:13,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:47:13,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:13,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:47:13,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:47:13,620 INFO L87 Difference]: Start difference. First operand 915 states and 2610 transitions. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 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 16:47:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:13,919 INFO L93 Difference]: Finished difference Result 1089 states and 3111 transitions. [2022-01-18 16:47:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 16:47:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:47:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:13,924 INFO L225 Difference]: With dead ends: 1089 [2022-01-18 16:47:13,924 INFO L226 Difference]: Without dead ends: 1089 [2022-01-18 16:47:13,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:47:13,926 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 197 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:13,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 327 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:47:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-01-18 16:47:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 981. [2022-01-18 16:47:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 2.843877551020408) internal successors, (2787), 980 states have internal predecessors, (2787), 0 states have call successors, (0), 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 16:47:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2787 transitions. [2022-01-18 16:47:13,945 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2787 transitions. Word has length 37 [2022-01-18 16:47:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:13,947 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 2787 transitions. [2022-01-18 16:47:13,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 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 16:47:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2787 transitions. [2022-01-18 16:47:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:47:13,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:13,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:13,968 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 16:47:14,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 16:47:14,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash 527779565, now seen corresponding path program 3 times [2022-01-18 16:47:14,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:14,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284627162] [2022-01-18 16:47:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:14,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:14,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284627162] [2022-01-18 16:47:14,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284627162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229898763] [2022-01-18 16:47:14,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:47:14,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:14,254 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 16:47:14,255 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 16:47:14,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:47:14,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:14,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:47:14,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:14,354 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 15 treesize of output 7 [2022-01-18 16:47:14,390 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 16:47:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:14,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:14,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:14,502 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 18 [2022-01-18 16:47:14,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:14,559 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 20 [2022-01-18 16:47:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:14,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229898763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:14,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:14,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-01-18 16:47:14,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747653736] [2022-01-18 16:47:14,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:14,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:47:14,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:14,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:47:14,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:47:14,600 INFO L87 Difference]: Start difference. First operand 981 states and 2787 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:14,778 INFO L93 Difference]: Finished difference Result 1282 states and 3686 transitions. [2022-01-18 16:47:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:47:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:47:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:14,783 INFO L225 Difference]: With dead ends: 1282 [2022-01-18 16:47:14,783 INFO L226 Difference]: Without dead ends: 1282 [2022-01-18 16:47:14,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:47:14,784 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 124 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:14,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 306 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:47:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-01-18 16:47:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1085. [2022-01-18 16:47:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.8625461254612548) internal successors, (3103), 1084 states have internal predecessors, (3103), 0 states have call successors, (0), 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 16:47:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 3103 transitions. [2022-01-18 16:47:14,804 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 3103 transitions. Word has length 42 [2022-01-18 16:47:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:14,804 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 3103 transitions. [2022-01-18 16:47:14,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 3103 transitions. [2022-01-18 16:47:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 16:47:14,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:14,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:14,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:15,026 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,SelfDestructingSolverStorable6 [2022-01-18 16:47:15,026 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash -571850497, now seen corresponding path program 4 times [2022-01-18 16:47:15,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:15,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997065370] [2022-01-18 16:47:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:15,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:15,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:15,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997065370] [2022-01-18 16:47:15,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997065370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:15,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906947288] [2022-01-18 16:47:15,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:47:15,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:15,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:15,078 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 16:47:15,079 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 16:47:15,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:47:15,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:15,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:47:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:47:15,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:47:15,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906947288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:15,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:47:15,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-01-18 16:47:15,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950830928] [2022-01-18 16:47:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:15,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:47:15,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:47:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:47:15,174 INFO L87 Difference]: Start difference. First operand 1085 states and 3103 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:15,201 INFO L93 Difference]: Finished difference Result 2090 states and 5979 transitions. [2022-01-18 16:47:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:47:15,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 16:47:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:15,209 INFO L225 Difference]: With dead ends: 2090 [2022-01-18 16:47:15,209 INFO L226 Difference]: Without dead ends: 2071 [2022-01-18 16:47:15,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:47:15,210 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:15,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-01-18 16:47:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1782. [2022-01-18 16:47:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 2.9348680516563728) internal successors, (5227), 1781 states have internal predecessors, (5227), 0 states have call successors, (0), 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 16:47:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5227 transitions. [2022-01-18 16:47:15,248 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5227 transitions. Word has length 47 [2022-01-18 16:47:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:15,249 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 5227 transitions. [2022-01-18 16:47:15,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5227 transitions. [2022-01-18 16:47:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 16:47:15,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:15,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:15,271 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 16:47:15,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:15,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2135625367, now seen corresponding path program 5 times [2022-01-18 16:47:15,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56192732] [2022-01-18 16:47:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:15,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:15,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56192732] [2022-01-18 16:47:15,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56192732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835333069] [2022-01-18 16:47:15,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:47:15,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:15,695 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 16:47:15,696 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 16:47:15,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:47:15,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:15,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:47:15,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:15,805 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 15 treesize of output 7 [2022-01-18 16:47:15,867 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 13 treesize of output 9 [2022-01-18 16:47:15,907 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 13 treesize of output 9 [2022-01-18 16:47:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:47:16,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:16,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:16,139 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 25 treesize of output 27 [2022-01-18 16:47:16,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:16,211 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 27 treesize of output 29 [2022-01-18 16:47:16,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:16,280 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 28 treesize of output 30 [2022-01-18 16:47:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:47:16,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835333069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:16,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:16,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-01-18 16:47:16,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809297495] [2022-01-18 16:47:16,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:16,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 16:47:16,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 16:47:16,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:47:16,361 INFO L87 Difference]: Start difference. First operand 1782 states and 5227 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:16,625 INFO L93 Difference]: Finished difference Result 3759 states and 11172 transitions. [2022-01-18 16:47:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:47:16,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 16:47:16,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:16,637 INFO L225 Difference]: With dead ends: 3759 [2022-01-18 16:47:16,637 INFO L226 Difference]: Without dead ends: 3024 [2022-01-18 16:47:16,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:47:16,638 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 262 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:16,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 673 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:47:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-01-18 16:47:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2478. [2022-01-18 16:47:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.9644731530076704) internal successors, (7343), 2477 states have internal predecessors, (7343), 0 states have call successors, (0), 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 16:47:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 7343 transitions. [2022-01-18 16:47:16,687 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 7343 transitions. Word has length 47 [2022-01-18 16:47:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:16,687 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 7343 transitions. [2022-01-18 16:47:16,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 7343 transitions. [2022-01-18 16:47:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-18 16:47:16,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:16,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:16,709 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 16:47:16,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:16,907 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1758235514, now seen corresponding path program 6 times [2022-01-18 16:47:16,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:16,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513358847] [2022-01-18 16:47:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:16,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:47:16,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:16,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513358847] [2022-01-18 16:47:16,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513358847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:16,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536844582] [2022-01-18 16:47:16,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:47:16,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:16,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:16,937 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 16:47:16,938 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 16:47:16,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:47:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:16,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:47:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 16:47:17,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:47:17,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536844582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:47:17,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:47:17,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-01-18 16:47:17,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638376182] [2022-01-18 16:47:17,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:47:17,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:47:17,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:17,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:47:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:47:17,027 INFO L87 Difference]: Start difference. First operand 2478 states and 7343 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 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 16:47:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:17,063 INFO L93 Difference]: Finished difference Result 4728 states and 14010 transitions. [2022-01-18 16:47:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:47:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-01-18 16:47:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:17,081 INFO L225 Difference]: With dead ends: 4728 [2022-01-18 16:47:17,082 INFO L226 Difference]: Without dead ends: 4688 [2022-01-18 16:47:17,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:47:17,082 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:17,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 70 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:17,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4688 states. [2022-01-18 16:47:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4688 to 3600. [2022-01-18 16:47:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 3599 states have (on average 3.0227841066963044) internal successors, (10879), 3599 states have internal predecessors, (10879), 0 states have call successors, (0), 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 16:47:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 10879 transitions. [2022-01-18 16:47:17,166 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 10879 transitions. Word has length 52 [2022-01-18 16:47:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:17,166 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 10879 transitions. [2022-01-18 16:47:17,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 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 16:47:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 10879 transitions. [2022-01-18 16:47:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-18 16:47:17,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:17,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:17,189 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 16:47:17,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 16:47:17,390 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1899159900, now seen corresponding path program 7 times [2022-01-18 16:47:17,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782395301] [2022-01-18 16:47:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:17,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:17,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:17,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782395301] [2022-01-18 16:47:17,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782395301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:17,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834478670] [2022-01-18 16:47:17,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:47:17,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:17,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:17,462 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 16:47:17,463 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 16:47:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:47:17,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:17,569 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 16:47:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:47:17,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:17,672 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:47:17,673 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 11 treesize of output 10 [2022-01-18 16:47:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:47:17,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834478670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:17,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:17,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-01-18 16:47:17,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697114977] [2022-01-18 16:47:17,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:17,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:47:17,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:17,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:47:17,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:47:17,710 INFO L87 Difference]: Start difference. First operand 3600 states and 10879 transitions. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:17,821 INFO L93 Difference]: Finished difference Result 671 states and 1625 transitions. [2022-01-18 16:47:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:47:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-01-18 16:47:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:17,827 INFO L225 Difference]: With dead ends: 671 [2022-01-18 16:47:17,827 INFO L226 Difference]: Without dead ends: 629 [2022-01-18 16:47:17,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-18 16:47:17,828 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 111 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:17,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 215 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:47:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-18 16:47:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2022-01-18 16:47:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.4140127388535033) internal successors, (1516), 628 states have internal predecessors, (1516), 0 states have call successors, (0), 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 16:47:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1516 transitions. [2022-01-18 16:47:17,842 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1516 transitions. Word has length 52 [2022-01-18 16:47:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:17,842 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1516 transitions. [2022-01-18 16:47:17,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1516 transitions. [2022-01-18 16:47:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 16:47:17,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:17,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:17,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:18,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:18,059 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1756713199, now seen corresponding path program 8 times [2022-01-18 16:47:18,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:18,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327373213] [2022-01-18 16:47:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:18,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:18,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327373213] [2022-01-18 16:47:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327373213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804398443] [2022-01-18 16:47:18,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:47:18,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:18,215 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 16:47:18,216 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 16:47:18,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:47:18,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:47:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:18,363 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 16:47:18,384 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 16:47:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:47:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:18,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:18,458 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 13 treesize of output 17 [2022-01-18 16:47:18,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:18,502 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 15 treesize of output 19 [2022-01-18 16:47:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:47:18,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804398443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:18,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:18,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 15 [2022-01-18 16:47:18,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520189667] [2022-01-18 16:47:18,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:18,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:47:18,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:47:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:47:18,584 INFO L87 Difference]: Start difference. First operand 629 states and 1516 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 16:47:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:18,908 INFO L93 Difference]: Finished difference Result 559 states and 1310 transitions. [2022-01-18 16:47:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:47:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 16:47:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:18,910 INFO L225 Difference]: With dead ends: 559 [2022-01-18 16:47:18,910 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 16:47:18,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:47:18,910 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 184 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:18,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 487 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:47:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 16:47:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2022-01-18 16:47:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.347670250896057) internal successors, (1310), 558 states have internal predecessors, (1310), 0 states have call successors, (0), 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 16:47:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1310 transitions. [2022-01-18 16:47:18,917 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1310 transitions. Word has length 57 [2022-01-18 16:47:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:18,918 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1310 transitions. [2022-01-18 16:47:18,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 16:47:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1310 transitions. [2022-01-18 16:47:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 16:47:18,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:18,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:18,935 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 16:47:19,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:19,135 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:19,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1970893599, now seen corresponding path program 9 times [2022-01-18 16:47:19,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:19,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56185365] [2022-01-18 16:47:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:19,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:19,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56185365] [2022-01-18 16:47:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56185365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772598757] [2022-01-18 16:47:19,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:47:19,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:19,765 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 16:47:19,766 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 16:47:19,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:47:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 16:47:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:20,572 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:47:20,572 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 31 treesize of output 19 [2022-01-18 16:47:20,677 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:47:20,678 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 35 treesize of output 19 [2022-01-18 16:47:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:20,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:20,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2022-01-18 16:47:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:21,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:21,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:21,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:21,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:21,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:21,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 59 [2022-01-18 16:47:22,338 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:47:22,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 84 [2022-01-18 16:47:23,066 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:47:23,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 107 [2022-01-18 16:47:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:23,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772598757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:23,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:23,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 57 [2022-01-18 16:47:23,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988107167] [2022-01-18 16:47:23,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:23,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 16:47:23,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:23,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 16:47:23,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:47:23,547 INFO L87 Difference]: Start difference. First operand 559 states and 1310 transitions. Second operand has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:47:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:26,814 INFO L93 Difference]: Finished difference Result 709 states and 1634 transitions. [2022-01-18 16:47:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 16:47:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-18 16:47:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:26,815 INFO L225 Difference]: With dead ends: 709 [2022-01-18 16:47:26,815 INFO L226 Difference]: Without dead ends: 0 [2022-01-18 16:47:26,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1222, Invalid=5750, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:47:26,817 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1181 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:26,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1250 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1941 Invalid, 0 Unknown, 15 Unchecked, 1.0s Time] [2022-01-18 16:47:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-18 16:47:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-18 16:47:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-18 16:47:26,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2022-01-18 16:47:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:26,818 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-18 16:47:26,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:47:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-18 16:47:26,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-18 16:47:26,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 16:47:26,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 16:47:26,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 16:47:26,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 16:47:26,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-18 16:47:27,035 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,SelfDestructingSolverStorable12 [2022-01-18 16:47:27,038 INFO L732 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1] [2022-01-18 16:47:27,039 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:47:27,039 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:47:27,041 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:47:27 BasicIcfg [2022-01-18 16:47:27,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:47:27,041 INFO L158 Benchmark]: Toolchain (without parser) took 15242.91ms. Allocated memory was 406.8MB in the beginning and 627.0MB in the end (delta: 220.2MB). Free memory was 364.7MB in the beginning and 394.3MB in the end (delta: -29.6MB). Peak memory consumption was 193.4MB. Max. memory is 16.0GB. [2022-01-18 16:47:27,041 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 406.8MB. Free memory is still 366.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:47:27,041 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.37ms. Allocated memory is still 406.8MB. Free memory was 364.7MB in the beginning and 363.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:47:27,041 INFO L158 Benchmark]: Boogie Preprocessor took 20.85ms. Allocated memory is still 406.8MB. Free memory was 363.1MB in the beginning and 362.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:47:27,042 INFO L158 Benchmark]: RCFGBuilder took 204.05ms. Allocated memory is still 406.8MB. Free memory was 362.0MB in the beginning and 351.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 16:47:27,042 INFO L158 Benchmark]: TraceAbstraction took 14988.13ms. Allocated memory was 406.8MB in the beginning and 627.0MB in the end (delta: 220.2MB). Free memory was 351.0MB in the beginning and 394.3MB in the end (delta: -43.3MB). Peak memory consumption was 178.7MB. Max. memory is 16.0GB. [2022-01-18 16:47:27,042 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 0.13ms. Allocated memory is still 406.8MB. Free memory is still 366.0MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.37ms. Allocated memory is still 406.8MB. Free memory was 364.7MB in the beginning and 363.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.85ms. Allocated memory is still 406.8MB. Free memory was 363.1MB in the beginning and 362.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 204.05ms. Allocated memory is still 406.8MB. Free memory was 362.0MB in the beginning and 351.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 14988.13ms. Allocated memory was 406.8MB in the beginning and 627.0MB in the end (delta: 220.2MB). Free memory was 351.0MB in the beginning and 394.3MB in the end (delta: -43.3MB). Peak memory consumption was 178.7MB. 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 - PositiveResult [Line: 104]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 14.9s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.1s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2257 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2257 mSDsluCounter, 3658 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 15 IncrementalHoareTripleChecker+Unchecked, 4265 mSDsCounter, 427 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4156 IncrementalHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 427 mSolverCounterUnsat, 515 mSDtfsCounter, 4156 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 848 GetRequests, 630 SyntacticMatches, 21 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3600occurred in iteration=10, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 13 MinimizatonAttempts, 2450 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 937 NumberOfCodeBlocks, 937 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1207 ConstructedInterpolants, 1 QuantifiedInterpolants, 9905 SizeOfPredicates, 52 NumberOfNonLiveVariables, 1024 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 186/448 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-18 16:47:27,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...